CELERITEK INC/CA
S-8, 1998-05-07
SEMICONDUCTORS & RELATED DEVICES
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<PAGE>   1
      As filed with the Securities and Exchange Commission on May 7, 1998
                                               Registration No. 333-____________
================================================================================


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                ----------------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                ----------------

                                 CELERITEK, INC.
             (Exact name of registrant as specified in its charter)

       CALIFORNIA                                      77-0057484
(State of incorporation)                    (I.R.S. Employer Identification No.)

                              3236 Scott Boulevard
                          Santa Clara, California 95054
          (Address, including zip code, of principal executive offices)

                                ----------------

                             1994 STOCK OPTION PLAN
                            (Full Title of the Plan)

                                ----------------

                                 Tamer Husseini
                                 Celeritek, Inc.
                              3236 Scott Boulevard
                          Santa Clara, California 95054
                     (Name and address of agent for service)

                                 (408) 986-5060
          (Telephone number, including area code, of agent for service)

                                ----------------

                                   Copies to:
                               JOHN V. ROOS, ESQ.
                       WILSON, SONSINI, GOODRICH & ROSATI
                            Professional Corporation
                               650 Page Mill Road
                           Palo Alto, California 94304


================================================================================

<PAGE>   2
<TABLE>
<CAPTION>
                                    CALCULATION OF REGISTRATION FEE
=======================================================================================================
  Title of                 Amount                Proposed                Proposed           Amount of
Securities to               to be             Maximum Offering       Maximum Aggregate     Registration
be Registered             Registered(1)      Price Per Share(2)      Offering Price(2)         Fee
- -------------------------------------------------------------------------------------------------------
<S>                       <C>                <C>                     <C>                   <C>     
Common Stock,
no par value               465,260                $10.55               $4,907,573.68        $1,447.73
=======================================================================================================
</TABLE>

(1)     Pursuant to Rule 429 of the Securities Act of 1933, as amended (the
        "Securities Act"), the prospectus delivered to participants under the
        Registrant's 1994 Stock Option Plan also relates to 816,595 shares
        initially registered under Form S-8 Registration No. 333-2886.

(2)     The Proposed Maximum Offering Price Per Share was estimated in part
        pursuant to Rule 457(h) under the Securities Act, and, in part, pursuant
        to Rule 457(c) under the Securities Act. With respect to (i) 75,436
        shares which are subject to outstanding options to purchase Common Stock
        under the 1994 Stock Option Plan (the "1994 Plan"), the Proposed Maximum
        Offering Price Per Share was estimated pursuant to Rule 457(h) under
        which Rule the per share price of options to purchase stock under an
        employee stock option plan may be estimated by reference to the exercise
        price of such options. The weighted average exercise price of the 75,436
        subject to outstanding options under the 1994 Plan is $13.38. With
        respect to 389,824 shares of Common Stock available for future grant
        under the 1994 Plan, the estimated Proposed Maximum Offering Price Per
        Share was estimated pursuant to Rule 457(c) whereby the per share price
        was determined by reference to the average between the high and low
        price reported in the Nasdaq National Market on May 4, 1998, which
        average was $10.00. The number referenced above in the table entitled
        "Proposed Maximum Offering Price per Share" represents a weighted
        average of the foregoing estimates calculated in accordance with Rules
        457(h) and 457(c).


<PAGE>   3
                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

        There are hereby incorporated by reference in this Registration
Statement the following documents and information heretofore filed with the
Securities and Exchange Commission:

        (a) The Registrant's latest annual report on Form 10-K for the fiscal
year ended March 31, 1997, pursuant to Section 13 of the Securities Exchange Act
of 1934 (the "Exchange Act").

        (b) The Registrant's Quarterly Reports on Form 10-Q for the fiscal
quarters ended June 30, 1997, September 30, 1997 and December 31, 1997, filed
pursuant to Section 13 of the Exchange Act.

       (c)  The Registrant's Current Report on Form 8-K dated April  , 1998.

       (d)  The description of the Registrant's Common Stock to be offered
hereby is contained in the Registrant's Registration Statement on Form 8-A filed
with the Securities and Exchange Commission on November 2, 1995 pursuant to
Section 12(g) of the Exchange Act, including any amendment or report filed for
the purpose of updating such description.

        All documents subsequently filed by the Registrant pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to the filing of a
post-effective amendment which indicates that all securities offered have been
sold or which deregisters all securities then remaining unsold, shall be deemed
to be incorporated by reference in this registration statement and to be part
hereof from the date of filing such documents.

ITEM 4.  DESCRIPTION OF SECURITIES.

        Not applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

        Not applicable.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

        The Registrant's Articles of Incorporation limit the liability of
directors for monetary damages to the maximum extent permitted by California
law. Such limitation of liability has no effect on the availability of equitable
remedies, such as injunctive relief or rescission.





                                      II-1
<PAGE>   4
        The Registrant's Bylaws provide that the Registrant will indemnify its
directors and officers and may indemnify its employees and agents (other than
officers and directors) against certain liabilities to the fullest extent
permitted by California law. The Registrant is also empowered under its Bylaws
to enter into indemnification agreements with its directors and officers and to
purchase insurance on behalf of any person whom it is required or permitted to
indemnify. The Registrant has entered into indemnification agreements with each
of its current directors and officers which provide for indemnification of, and
advancement of expenses to, such persons to the greatest extent permitted by
California law, including by reason of action or inaction occurring in the past
and circumstances in which indemnification and advancement of expenses are
discretionary under California law. Insofar as indemnification for liabilities
arising under the Securities Act may be permitted to directors, officers or
persons controlling the Registrant pursuant to the foregoing provisions, the
Registrant has been informed that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Securities Act and is therefore unenforceable.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

        Not applicable.

ITEM 8.  EXHIBITS.

<TABLE>
<CAPTION>
       Exhibit
       Number
       -------
       <S>            <C>                                                       
         4.1          1994 Stock Option Plan and form of Stock Option Agreement.
         5.1          Opinion of Wilson, Sonsini, Goodrich & Rosati, P.C.,
                      as to legality of securities being registered
        23.1          Consent of Ernst & Young LLP, Independent Auditors.
        23.2          Consent of Counsel (contained in Exhibit 5.1)
        24.1          Power of Attorney (see Page II-4)
        27.1          Financial Data Schedule
        27.2          Financial Data Schedule
        27.3          Financial Data Schedule                   
        27.4          Financial Data Schedule   
</TABLE>


ITEM 9.  UNDERTAKINGS.

        (a)  The undersigned Registrant hereby undertakes:

               (1) To file, during any period in which offers or sales are being
made, a post-effective amendment to this registration statement to include any
material information with respect to the plan of distribution not previously
disclosed in the registration statement or any material change to such
information in the registration statement.

               (2) That, for the purpose of determining any liability under the
Securities Act, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.



                                      II-2
<PAGE>   5
               (3) To remove from registration by means of a post-effective
amendment any of the securities being registered which remain unsold at the
termination of the offering.

        (b) The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) that is
incorporated by reference in the registration statement shall be deemed to be a
new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

        (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Securities Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities
Act and will be governed by the final adjudication of such issue.



                                      II-3
<PAGE>   6
                                   SIGNATURES


        Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Santa Clara, State of California, on April 24,
1998


                                  CELERITEK, INC.


                                  By: /s/ Tamer Husseini
                                      ------------------------------------------
                                      Tamer Husseini, President, Chief Executive
                                      Officer and Chairman of the Board


                                POWER OF ATTORNEY


        KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Tamer Husseini and Margaret E. Smith, and
each of them, their true and lawful attorneys and agents, with full power of
substitution, each with power to act alone, to sign and execute on behalf of the
undersigned any amendment or amendments to this Registration Statement on Form
S-8 and to perform any acts necessary in order to file such amendments, and each
of the undersigned does hereby ratify and confirm all that said attorneys and
agents, or their or his or her substitutes, shall do or cause to be done by
virtue hereof.



                                      II-4
<PAGE>   7

        Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.


<TABLE>
<CAPTION>
       SIGNATURE                           TITLE                         DATE
       ---------                           -----                         ----
<S>                           <C>                                   <C>        
/s/ Tamer Husseini            President, Chief Executive            April 24, 1998
- ----------------------------  Officer and Chairman of the                              
(Tamer Husseini)              Board of Directors (principal                            
                              executive officer)                                       
                                                                                       
                                                                                       
                                                                                       
/s/ Margaret E. Smith         Senior Vice President, Finance, and   April 24, 1998
- ----------------------------  Chief Financial Officer (principal                       
(Margaret E. Smith)           financial and accounting officer)                        
                                                                                       
                                                                                       
                                                                                       
                                                                                       
/s/ Robert C. Mullaley        Director                              April 24, 1998 
- ----------------------------                                                           
(Robert C. Mullaley)                                                                   
                                                                                       
                                                                                       
/s/ William D. Rasdal         Director                              April 24, 1998 
- ----------------------------                                                           
(William D. Rasdal)                                                                    
                                                                                       
                                                                                       
/s/ Charles P. Waite          Director                              April 24, 1998 
- ----------------------------                                                           
(Charles P. Waite)                                                                     
                                                                                       
                                                                                       
/s/ William H. Younger, Jr.   Director                              April 24, 1998 
- ----------------------------  
(William H. Younger, Jr.)
</TABLE>





                                      II-5
<PAGE>   8
                                 CELERITEK, INC.

                       REGISTRATION STATEMENT ON FORM S-8

                                INDEX TO EXHIBITS


<TABLE>
<CAPTION>
Exhibit
Number                          Description
- -------                         -----------
<S>         <C>                                                       
  4.1       1994 Stock Option Plan and form of Stock Option Agreement.

  5.1       Opinion of Wilson, Sonsini, Goodrich & Rosati, P.C., as to legality 
            of securities being registered.

 23.1       Consent Ernst & Young LLP, Independent Auditors.

 23.2       Consent of Counsel (contained in Exhibit 5.1).

 24.1       Power of Attorney (see Page II-4).

 27.1       Financial Data Schedule

 27.2       Financial Data Schedule

 27.3       Financial Data Schedule

 27.4       Financial Data Schedule     
</TABLE>





                                      II-6

<PAGE>   1
                                                                     EXHIBIT 4.1

                                CELERITEK, INC.
                             1994 STOCK OPTION PLAN
                      (as amended through August 13, 1997)

        1. Purposes of the Plan. The purposes of this Stock Option Plan are:

               -- to attract and retain the best available personnel for 
                  positions of substantial responsibility,

               -- to provide additional incentive to Employees, Directors and 
                  Consultants, and

               -- To promote the success of the Company's business.

Options granted under the Plan may be Incentive Stock Options or Nonstatutory
Stock Options, as determined by the Administrator at the time of grant.

        2. Definitions. As used herein, the following definitions shall apply:

               (a) "Administrator" means the Board or any of its Committees as
shall be administering the Plan, in accordance with Section 4 of the Plan.

               (b) "Applicable Laws" means the legal requirements relating to
the administration of stock option plans under state corporate and securities
laws and the Code.

               (c) "Board" means the Board of Directors of the Company.

               (d) "Code" means the Internal Revenue Code of 1986, as amended.

               (e) "Committee" means a Committee appointed by the Board in
accordance with Section 4 of the Plan.

               (f) "Common Stock" means the common stock of the Company.

               (g) "Company" means Celeritek, Inc., a California corporation.

               (h) "Consultant" means any person, including an advisor, engaged
by the Company or a Parent or Subsidiary to render services and who is
compensated for such services.

               (i) "Continuous Status as an Employee, Director or Consultant"
means that the employment relationship, directorship or consulting relationship
with the Company, any Parent or Subsidiary is not interrupted or terminated.
Continuous Status as an Employee, Director or Consultant shall not be considered
interrupted in the case of (i) any leave of absence approved by the Company or
(ii) transfers between locations of the Company or between the Company, its
Parent, any Subsidiary, or any successor. A leave of absence approved by the
Company shall include sick


<PAGE>   2
leave, military leave, or any other personal leave. For purposes of Incentive
Stock Options, no such leave may exceed 90 days, unless reemployment upon
expiration of such leave is guaranteed by statute or contract, including Company
policies. If reemployment upon expiration of a leave of absence approved by the
Company is not so guaranteed, on the 91st day of such leave any Incentive Stock
Option held by the Optionee shall cease to be treated as an Incentive Stock
Option and shall be treated for tax purposes as a Nonstatutory Stock Option.

               (j) "Director" means a member of the Board.

               (k) "Disability" means total and permanent disability as defined
in Section 22(e)(3) of the Code.

               (l) "Employee" means any person, including Officers and
Directors, employed by the Company or any Parent or Subsidiary of the Company.
Neither service as a Director nor payment of a director's fee by the Company
shall be sufficient to constitute "employment" by the Company.

               (m) "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

               (n) "Fair Market Value" means, as of any date, the value per
Share of Common Stock determined as follows:

                      (1)    If the Common Stock is listed on any established 
stock exchange or a national market system, including without limitation the
National Market System of the National Association of Securities Dealers, Inc.
Automated Quotation ("NASDAQ") System, the Fair Market Value of a Share of
Common Stock shall be the closing sale price for such stock (or the mean of the
closing bid and asked prices, if no sales were reported), as quoted on such
exchange (or the exchange with the greatest volume of trading in Common Stock)
or system on the date of such determination (or, in the event such date is not a
trading day, the trading day immediately prior to the date of such
determination), as reported in The Wall Street Journal or such other source as
the Board deems reliable; or

                      (2)    If the Common Stock is quoted on the NASDAQ system
(but not on the National Market System thereof) or is regularly quoted by a
recognized securities dealer but selling prices are not reported, the Fair
Market Value of a Share of Common Stock shall be the mean of the closing bid and
asked prices for such stock on the date of such determination (or, in the event
such date is not a trading day, the trading day immediately prior to the date of
such determination), as reported in The Wall Street Journal or such other source
as the Board deems reliable; or

                      (3) In the absence of an established market for the Common
Stock, the Fair Market Value thereof shall be determined in good faith by the
Administrator.

               (o) "Incentive Stock Option" means an Option intended to qualify
as an incentive stock option within the meaning of Section 422 of the Code and
the regulations promulgated thereunder.




                                      -2-
<PAGE>   3
               (p) "Nonstatutory Stock Option" means an Option not intended to
qualify as an Incentive Stock Option.

               (q) "Notice of Grant" means a written notice evidencing certain
terms and conditions of an individual Option. The Notice of Grant is part of the
Option Agreement.

               (r) "Officer" means a person who is an officer of the Company
within the meaning of Section 16 of the Exchange Act and the rules and
regulations promulgated thereunder.

               (s) "Option" means a stock option granted pursuant to the Plan.

               (t) "Option Agreement" means a written agreement between the
Company and an Optionee evidencing the terms and conditions of an individual
Option grant. The Option Agreement is subject to the terms and conditions of the
Plan.

               (u) "Option Exchange Program" means a program whereby outstanding
options are surrendered in exchange for options with a lower exercise price.

               (v) "Optioned Stock" means the Common Stock subject to an Option.

               (w) "Optionee" means an Employee, Director or Consultant who
holds an outstanding Option.

               (x) "Parent" means a "parent corporation", whether now or
hereafter existing, as defined in Section 424(e) of the Code.

               (y)    "Plan" means this Celeritek, Inc. 1994 Stock Option Plan.

               (z) "Rule 16b-3" means Rule 16b-3 of the Exchange Act or any
successor to Rule 16b-3, as in effect when discretion is being exercised with
respect to the Plan.

               (aa) "Share" means a share of the Common Stock, as adjusted in
accordance with Section 12 of the Plan.

               (bb) "Subsidiary" means a "subsidiary corporation", whether now
or hereafter existing, as defined in Section 424(f) of the Code.

        3. Stock Subject to the Plan. Subject to the provisions of Section 12 of
the Plan, the maximum aggregate number of Shares which may be optioned and sold
under the Plan is 1,012,465 Shares, plus an annual increase to be added on March
31 of each year, beginning with March 31, 1998, equal to the lesser of (i)
250,000 Shares, (ii) 3% of the outstanding Shares on such date or (iii) a lesser
amount determined by the Board. The Shares may be authorized, but unissued, or
reacquired Common Stock.



                                      -3-
<PAGE>   4
               If an Option expires or becomes unexercisable without having been
exercised in full, or is surrendered pursuant to an Option Exchange Program, the
unpurchased Shares which were subject thereto shall become available for future
grant or sale under the Plan (unless the Plan has terminated). Shares that have
actually been issued under the Plan, upon exercise of an Option, shall not be
returned to the Plan and shall not become available for future distribution
under the Plan.

        4. Administration of the Plan.

               (a)    Procedure.

                      (i)    Multiple Administrative Bodies.  The Plan may be 
administered by different Committees with respect to different groups of
Employees, Directors and Consultants.

                      (ii) Section 162(m). To the extent that the Administrator
determines it to be desirable to qualify Options granted hereunder as
"performance-based compensation" within the meaning of Section 162(m) of the
Code, the Plan shall be administered by a Committee of two or more "outside
directors" within the meaning of Section 162(m) of the Code.

                      (iii) Rule 16b-3. To the extent desirable to qualify
transactions hereunder as exempt under Rule 16b-3, the transactions contemplated
hereunder shall be structured to satisfy the requirements for exemption under
Rule 16b-3.

                      (iv)   Other Administration.  Other than as provided 
above, the Plan shall be administered by (A) the Board or (B) a Committee, which
Committee shall be constituted to satisfy Applicable Laws.

               (b) Powers of the Administrator. Subject to the provisions of the
Plan, and in the case of a Committee, subject to the specific duties delegated
by the Board to such Committee, the Administrator shall have the authority, in
its discretion:

                      (i)    to determine the Fair Market Value of the Common 
Stock, in accordance with Section 2(n) of the Plan;

                      (ii) to select the Employees, Directors and Consultants to
whom Options may be granted hereunder;

                      (iii) to determine whether and to what extent Options are
granted hereunder;

                      (iv) to determine the number of shares of Common Stock to
be covered by each Option granted hereunder;

                      (v)    to approve forms of agreement for use under the 
Plan;



                                      -4-
<PAGE>   5
                      (vi) to determine the terms and conditions, not
inconsistent with the terms of the Plan, of any award granted hereunder. Such
terms and conditions include, but are not limited to, the exercise price, the
time or times when Options may be exercised (which may be based on performance
criteria), any vesting acceleration or waiver of forfeiture restrictions, and
any restriction or limitation regarding any Option or the shares of Common Stock
relating thereto, based in each case on such factors as the Administrator, in
its sole discretion, shall determine;

                      (vii) to reduce the exercise price of any Option to the
then current Fair Market Value if the Fair Market Value of the Common Stock
covered by such Option shall have declined since the date the Option was
granted;

                      (viii) to construe and interpret the terms of the Plan and
awards granted pursuant to the Plan;

                      (ix) to prescribe, amend and rescind rules and regulations
relating to the Plan;

                      (x) to prescribe, amend and rescind rules and regulations
relating to the Plan, including rules and regulations relating to sub-plans
established for the purpose of qualifying for preferred tax treatment under
foreign tax laws;

                      (xi) to modify or amend each Option (subject to Section
14(c) of the Plan);

                      (xii) to allow Optionees to satisfy withholding tax
obligations by electing to have the Company withhold from the Shares to be
issued upon exercise of an Option that number of Shares having a Fair Market
Value equal to the amount required to be withheld. The Fair Market Value of the
Shares to be withheld shall be determined on the date that the amount of tax to
be withheld is to be determined. All elections by an Optionee to have Shares
withheld for this purpose shall be made in such form and under such conditions
as the Administrator may deem necessary or advisable;

                      (xiii) to authorize any person to execute on behalf of the
Company any instrument required to effect the grant of an Option previously
granted by the Administrator;

                      (xiv)  to institute an Option Exchange Program;

                      (xv) to determine the terms and restrictions applicable to
Options and any Restricted Stock; and

                      (xvi) to make all other determinations deemed necessary or
advisable for administering the Plan.



                                      -5-
<PAGE>   6
               (c) Effect of Administrator's Decision. The Administrator's
decisions, determinations and interpretations shall be final and binding on all
Optionees and any other holders of Options.

        5. Eligibility. Nonstatutory Stock Options may be granted to Employees,
Directors and Consultants. Incentive Stock Options may be granted only to
Employees. If otherwise eligible, an Employee, Director or Consultant who has
been granted an Option may be granted additional Options.

        6.     Limitations.

               (a) Each Option shall be designated in the Notice of Grant as
either an Incentive Stock Option or a Nonstatutory Stock Option. Notwithstanding
such designations, to the extent that the aggregate Fair Market Value of Shares
subject to an Optionee's Incentive Stock Options granted by the Company, any
Parent or Subsidiary, which become exercisable for the first time during any
calendar year (under all plans of the Company or any Parent or Subsidiary)
exceeds $100,000, such excess Options shall be treated as Nonstatutory Stock
Options. For purposes of this Section 6(a), incentive stock options shall be
taken into account in the order in which they were granted, and the Fair Market
Value of the Shares shall be determined as of the time of grant.

               (b) Neither the Plan nor any Option shall confer upon an Optionee
any right with respect to continuing the Optionee's employment relationship,
directorship or consulting relationship with the Company, nor shall they
interfere in any way with the Optionee's right or the Company's right to
terminate such employment relationship, directorship or consulting relationship
at any time, with or without cause.

               (c) The following limitations shall apply to grants of Options to
Employees:

                      (i)    No Employee shall be granted, in any fiscal year 
of the Company, Options to purchase more than 750,000 Shares.

                      (ii) The foregoing limitation shall be adjusted
proportionately in connection with any change in the Company's capitalization as
described in Section 12(a).

                      (iii) If an Option is cancelled (other than in connection
with a transaction described in Section 12), the cancelled Option will be
counted against the limit set forth in Section 6(c)(i). For this purpose, if the
exercise price of an Option is reduced, the transaction will be treated as a
cancellation of the Option and the grant of a new Option.

        7. Term of Plan. Subject to Section 18 of the Plan, the Plan shall
become effective upon the earlier to occur of its adoption by the Board or its
approval by the shareholders of the Company. It shall continue in effect for a
term of ten (10) years unless terminated earlier under Section 14 of the Plan.



                                      -6-
<PAGE>   7
        8. Term of Option. The term of each Option shall be stated in the Notice
of Grant. In the case of an Incentive Stock Option, the term shall be no more
than ten (10) years from the date of grant. In the case of an Incentive Stock
Option granted to an Optionee who, at the time the Incentive Stock Option is
granted, owns stock representing more than ten percent (10%) of the voting power
of all classes of stock of the Company or any Parent or Subsidiary, the term of
the Incentive Stock Option shall be no more than five (5) years from the date of
grant.

        9.     Option Exercise Price and Consideration.

               (a) Exercise Price. The per share exercise price for the Shares
to be issued pursuant to exercise of an Option shall be determined by the
Administrator, subject to the following:

                      (i)    In the case of an Incentive Stock Option

                             (A)    granted to an Employee who, at the time the 
Incentive Stock Option is granted, owns stock representing more than ten percent
(10%) of the voting power of all classes of stock of the Company or any Parent
or Subsidiary, the per Share exercise price shall be no less than 110% of the
Fair Market Value per Share on the date of grant.

                             (B) granted to any other Employee, the per Share
exercise price shall be no less than 100% of the Fair Market Value per Share on
the date of grant.

                      (ii) In the case of a Nonstatutory Stock Option, the per
Share exercise price shall be determined by the Administrator. In the case of a
Nonstatutory Stock Option intended to qualify as "performance-based
compensation" within the meaning of Section 162(m) of the Code, the per Share
exercise price shall be no less than 100% of the Fair Market Value per Share on
the date of grant.

                      (iii) Notwithstanding the foregoing, Options may be
granted with a per Share exercise price of less than 100% of the Fair Market
Value per Share on the date of grant pursuant to a merger or other corporate
transaction.

               (b) Waiting Period and Exercise Dates. At the time an Option is
granted, the Administrator shall fix the period within which the Option may be
exercised and shall determine any conditions which must be satisfied before the
Option may be exercised. In so doing, the Administrator may specify that an
Option may not be exercised until the completion of a service period.

               (c) Form of Consideration. The Administrator shall determine the
acceptable form of consideration for exercising an Option, including the method
of payment. In the case of an Incentive Stock Option, the Administrator shall
determine the acceptable form of consideration at the time of grant. Such
consideration may consist entirely of:

                      (i)    cash;


                                      -7-
<PAGE>   8
                      (ii)   check;

                      (iii)  promissory note;

                      (iv) other Shares which (A) in the case of Shares acquired
upon exercise of an option, have been owned by the Optionee for more than six
months on the date of surrender, and (B) have a Fair Market Value on the date of
surrender equal to the aggregate exercise price of the Shares as to which said
Option shall be exercised;

                      (v) delivery of a properly executed exercise notice
together with such other documentation as the Administrator and the broker, if
applicable, shall require to effect an exercise of the Option and delivery to
the Company of the sale or loan proceeds required to pay the exercise price;

                      (vi) a reduction in the amount of any Company liability to
the Optionee, including any liability attributable to the Optionee's
participation in any Company-sponsored deferred compensation program or
arrangement;

                      (vii)  any combination of the foregoing methods of 
payment; or

                      (viii) such other consideration and method of payment for
the issuance of Shares to the extent permitted by Applicable Laws.

        10. Exercise of Option.

               (a) Procedure for Exercise; Rights as a Shareholder. Any Option
granted hereunder shall be exercisable according to the terms of the Plan and at
such times and under such conditions as determined by the Administrator and set
forth in the Option Agreement.

                      An Option may not be exercised for a fraction of a Share.

                      An Option shall be deemed exercised when the Company 
receives: (i) written notice of exercise (in accordance with the Option
Agreement) from the person entitled to exercise the Option, and (ii) full
payment for the Shares with respect to which the Option is exercised. Full
payment may consist of any consideration and method of payment authorized by the
Administrator and permitted by the Option Agreement and the Plan. Shares issued
upon exercise of an Option shall be issued in the name of the Optionee or, if
requested by the Optionee, in the name of the Optionee and his or her spouse.
Until the stock certificate evidencing such Shares is issued (as evidenced by
the appropriate entry on the books of the Company or of a duly authorized
transfer agent of the Company), no right to vote or receive dividends or any
other rights as a shareholder shall exist with respect to the Optioned Stock,
notwithstanding the exercise of the Option. The Company shall issue (or cause to
be issued) such stock certificate promptly after the Option is exercised. No
adjustment will be made for a dividend or other right for which the record date
is prior to the date the stock certificate is issued, except as provided in
Section 12 of the Plan.


                                      -8-
<PAGE>   9
                      Exercising an Option in any manner shall decrease the 
number of Shares thereafter available, both for purposes of the Plan and for
sale under the Option, by the number of Shares as to which the Option is
exercised.

               (b) Termination of Employment or Consulting Relationship. Upon
termination of an Optionee's Continuous Status as an Employee, Director or
Consultant, other than upon the Optionee's death or Disability, the Optionee may
exercise his or her Option, but only within such period of time as is specified
in the Notice of Grant, and only to the extent that the Optionee was entitled to
exercise it at the date of termination (but in no event later than the
expiration of the term of such Option as set forth in the Notice of Grant). In
the absence of a specified time in the Notice of Grant, the Option shall remain
exercisable for 90 days following the Optionee's termination. In the case of an
Incentive Stock Option, such period of time for exercise shall not exceed ninety
(90) days from the date of termination. Notwithstanding the above provisions of
this paragraph, in the event of changes in an Optionee's status between
Employee, Director or Consultant, an Option held by the Optionee shall not
automatically terminate solely as a result of such change in status. However, an
Incentive Stock Option shall cease to be treated as an Incentive Stock Option
and shall be treated for tax purposes as a Nonstatutory Stock Option on the
ninety-first (91st) day following the day Optionee ceases to be an Employee. If,
at the date of termination, the Optionee is not entitled to exercise his or her
entire Option, the Shares covered by the unexercisable portion of the Option
shall revert to the Plan. If, after termination, the Optionee does not exercise
his or her Option within the time specified by the Administrator, the Option
shall terminate, and the Shares covered by such Option shall revert to the Plan.

               (c) Disability of Optionee. In the event that an Optionee's
Continuous Status as an Employee, Director or Consultant terminates as a result
of the Optionee's Disability, the Optionee may exercise his or her Option at any
time within twelve (12) months from the date of such termination, but only to
the extent that the Optionee was entitled to exercise it at the date of such
termination (but in no event later than the expiration of the term of such
Option as set forth in the Notice of Grant). If, at the date of termination, the
Optionee is not entitled to exercise his or her entire Option, the Shares
covered by the unexercisable portion of the Option shall revert to the Plan. If,
after termination, the Optionee does not exercise his or her Option within the
time specified herein, the Option shall terminate, and the Shares covered by
such Option shall revert to the Plan.

               (d) Death of Optionee. In the event of the death of an Optionee,
the Option may be exercised at any time within twelve (12) months following the
date of death (but in no event later than the expiration of the term of such
Option as set forth in the Notice of Grant), by the Optionee's estate or by a
person who has acquired the right to exercise the Option by bequest or
inheritance, but only to the extent that the Optionee was entitled to exercise
the Option at the date of death. If, at the time of death, the Optionee was not
entitled to exercise his or her entire Option, the Shares covered by the
unexercisable portion of the Option shall immediately revert to the Plan. If,
after death, the Optionee's estate or a person who acquired the right to
exercise the Option by bequest or inheritance does not exercise the Option
within the time specified herein, the Option shall terminate, and the Shares
covered by such Option shall revert to the Plan.



                                      -9-
<PAGE>   10
        11. Non-Transferability of Options. Unless determined otherwise by the
Administrator, an Option may not be sold, pledged, assigned, hypothecated,
transferred, or disposed of in any manner other than by will or by the laws of
descent or distribution and may be exercised, during the lifetime of the
Optionee, only by the Optionee. If the Administrator makes an Option
transferable, such Option shall contain such additional terms and conditions as
the Administrator deems appropriate.

        12. Adjustments Upon Changes in Capitalization, Dissolution, Merger,
            Asset Sale or Change of Control.

               (a) Changes in Capitalization. Subject to any required action by
the shareholders of the Company, the number of shares of Common Stock covered by
each outstanding Option, and the number of shares of Common Stock which have
been authorized for issuance under the Plan but as to which no Options have yet
been granted or which have been returned to the Plan upon cancellation or
expiration of an Option. as well as the price per share of Common Stock covered
by each such outstanding Option, shall be proportionately adjusted for any
increase or decrease in the number of issued shares of Common Stock resulting
from a stock split, reverse stock split, stock dividend, combination or
reclassification of the Common Stock, or any other increase or decrease in the
number of issued shares of Common Stock effected without receipt of
consideration by the Company; provided, however, that conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of consideration." Such adjustment shall be made by the Board,
whose determination in that respect shall be final, binding and conclusive.
Except as expressly provided herein, no issuance by the Company of shares of
stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to,
the number or price of shares of Common Stock subject to an Option.

               (b) Dissolution or Liquidation. In the event of the proposed
dissolution or liquidation of the Company, to the extent that an Option has not
been previously exercised, it will terminate immediately prior to the
consummation of such proposed action. The Board may, in the exercise of its sole
discretion in such instances, declare that any Option shall terminate as of a
date fixed by the Board and give each Optionee the right to exercise his or her
Option as to all or any part of the Optioned Stock, including Shares as to which
the Option would not otherwise be exercisable.

               (c) Merger or Asset Sale. In the event of a merger of the Company
with or into another corporation, or the sale of substantially all of the assets
of the Company, each outstanding Option shall be assumed or an equivalent option
shall be substituted by the successor corporation or a Parent or Subsidiary of
the successor corporation. In the event that the successor corporation refuses
to assume or substitute the Option, the Optionee shall have the right to
exercise the Option as to all of the Optioned Stock, including Shares as to
which it would not otherwise be exercisable. If an Option becomes fully
exercisable in lieu of assumption or substitution in the event of a merger or
sale of assets, the Administrator shall notify the Optionee that the Option
shall be fully exercisable for a period of fifteen (15) days from the date of
such notice, and the Option shall terminate upon the expiration of such period.



                                      -10-
<PAGE>   11
        13. Date of Grant. The date of grant of an Option shall be, for all
purposes, the date on which the Administrator makes the determination granting
such Option, or such other later date as is determined by the Administrator.
Notice of the determination shall be provided to each Optionee within a
reasonable time after the date of such grant.

        14. Amendment and Termination of the Plan.

               (a) Amendment and Termination. The Board may at any time amend,
alter, suspend or terminate the Plan.

               (b) Shareholder Approval. The Company shall obtain shareholder
approval of any Plan amendment to the extent necessary and desirable to comply
with Applicable Laws. Such shareholder approval, if required, shall be obtained
in such a manner and to such a degree as is required by Applicable Laws.

               (c) Effect of Amendment or Termination. No amendment, alteration,
suspension or termination of the Plan shall impair the rights of any Optionee,
unless mutually agreed otherwise between the Optionee and the Administrator,
which agreement must be in writing and signed by the Optionee and the Company.

        15. Conditions Upon Issuance of Shares.

               (a) Legal Compliance. Shares shall not be issued pursuant to the
exercise of an Option unless the exercise of such Option and the issuance and
delivery of such Shares shall comply with all relevant provisions of law,
including, without limitation, the Securities Act of 1933, as amended, the
Exchange Act, the rules and regulations promulgated thereunder, Applicable Laws,
and the requirements of any stock exchange or quotation system upon which the
Shares may then be listed or quoted, and shall be further subject to the
approval of counsel for the Company with respect to such compliance.

               (b) Investment Representations. As a condition to the exercise of
an Option, the Company may require the person exercising such Option to
represent and warrant at the time of any such exercise that the Shares are being
purchased only for investment and without any present intention to sell or
distribute such Shares if, in the opinion of counsel for the Company, such a
representation is required.

        16. Liability of Company.

               (a) Inability to Obtain Authority. The inability of the Company
to obtain authority from any regulatory body having jurisdiction, which
authority is deemed by the Company's counsel to be necessary to the lawful
issuance and sale of any Shares hereunder, shall relieve the Company of any
liability in respect of the failure to issue or sell such Shares as to which
such requisite authority shall not have been obtained.



                                      -11-
<PAGE>   12
               (b) Grants Exceeding Allotted Shares. If the Optioned Stock
covered by an Option exceeds, as of the date of grant, the number of Shares
which may be issued under the Plan without additional shareholder approval, such
Option shall be void with respect to such excess Optioned Stock, unless
shareholder approval of an amendment sufficiently increasing the number of
Shares subject to the Plan is timely obtained in accordance with Section 14(b)
of the Plan.

        17. Reservation of Shares. The Company, during the term of this Plan,
will at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

        18. Shareholder Approval. Continuance of the Plan shall be subject to
approval by the shareholders of the Company within twelve (12) months before or
after the date the Plan is adopted. Such shareholder approval shall be obtained
in the manner and to the degree required under applicable federal and state law.




                                      -12-
<PAGE>   13
                                 CELERITEK, INC.
                             1994 STOCK OPTION PLAN
                             STOCK OPTION AGREEMENT

        Unless otherwise defined herein, the terms defined in the Plan shall
have the same defined meanings in this Option Agreement.

I.  NOTICE OF STOCK OPTION GRANT

[Optionee's Name and Address]

- -------------------------------------

        You have been granted an option to purchase Common Stock of the Company,
subject to the terms and conditions of the Plan and this Option Agreement, as
follows:

<TABLE>
<CAPTION>
<S>                                              <C>   <C>
        Grant Number                                   _________________________

        Date of Grant                                  _________________________

        Vesting Commencement Date                      _________________________

        Exercise Price per Share                       $________________________

        Total Number of Shares Granted                 _________________________

        Total Exercise Price                           $_________________________

        Type of Option:                          ___   Incentive Stock Option

                                                 ___   Nonstatutory Stock Option

        Term/Expiration Date:                          _________________________
</TABLE>


        Vesting Schedule:

        This Option may be exercised, in whole or in part, in accordance with
the following schedule:

        Termination Period:

        This Option may be exercised for _____ [months/days] after termination
of your Continuous Status as an Employee, Director or Consultant, or such longer
period as may be applicable upon death or disability of Optionee as provided in
the Plan. In the event of changes in

<PAGE>   14
the Optionee's status between Employee, Director or Consultant, this Option
Agreement shall remain in effect. In no event shall this Option be exercised
later than the Term/Expiration Date as provided above.

II.     AGREEMENT

        1. Grant of Option. The Plan Administrator of the Company hereby grants
to the Optionee named in the Notice of Grant attached as Part I of this
Agreement (the "Optionee"), an option (the "Option") to purchase the number of
Shares, as set forth in the Notice of Grant, at the exercise price per share set
forth in the Notice of Grant (the "Exercise Price"), subject to the terms and
conditions of the Plan, which is incorporated herein by reference. Subject to
Section 14(c) of the Plan, in the event of a conflict between the terms and
conditions of the Plan and the terms and conditions of this Option Agreement,
the terms and conditions of the Plan shall prevail.

              If designated in the Notice of Grant as an Incentive Stock Option
("ISO"), this Option is intended to qualify as an Incentive Stock Option under
Section 422 of the Code. However, if this Option is intended to be an Incentive
Stock Option, to the extent that it exceeds the $100,000 rule of Code Section
422(d) it shall be treated as a Nonstatutory Stock Option ("NSO").

        2. Exercise of Option.

              (a) Right to Exercise. This Option is exercisable during its term
in accordance with the Vesting Schedule set out in the Notice of Grant and the
applicable provisions of the Plan and this Option Agreement. In the event of
Optionee's death, Disability or other termination of Optionee's employment or
consulting relationship, the exercisability of the Option is governed by the
applicable provisions of the Plan and this Option Agreement.

              (b) Method of Exercise. This Option is exercisable by delivery of
an exercise notice, in the form attached as Exhibit A (the "Exercise Notice"),
which shall state the election to exercise the Option, the number of Shares in
respect of which the Option is being exercised (the "Exercised Shares"), and
such other representations and agreements as may be required by the Company
pursuant to the provisions of the Plan. The Exercise Notice shall be signed by
the Optionee and shall be delivered in person or by certified mail to the
Secretary of the Company. The Exercise Notice shall be accompanied by payment of
the aggregate Exercise Price as to all Exercised Shares. This Option shall be
deemed to be exercised upon receipt by the Company of such fully executed
Exercise Notice accompanied by such aggregate Exercise Price.

              No Shares shall be issued pursuant to the exercise of this Option
unless such issuance and exercise complies with all relevant provisions of law
and the requirements of any stock exchange or quotation service upon which the
Shares are then listed. Assuming such compliance, for income tax purposes the
Exercised Shares shall be considered transferred to the Optionee on the date the
Option is exercised with respect to such Exercised Shares.




                                      -2-
<PAGE>   15

        3. Method of Payment. Payment of the aggregate Exercise Price shall be
by any of the following, or a combination thereof, at the election of the
Optionee:

              (a)    cash; or

              (b)    check; or

              (c) delivery of a properly executed exercise notice together with
such other documentation as the Administrator and the broker, if applicable,
shall require to effect an exercise of the Option and delivery to the Company of
the sale or loan proceeds required to pay the exercise price; or

              (d) surrender of other Shares which (i) in the case of Shares
acquired upon exercise of an option, have been owned by the Optionee for more
than six (6) months on the date of surrender, AND (ii) have a Fair Market Value
on the date of surrender equal to the aggregate Exercise Price of the Exercised
Shares; or

        4. Non-Transferability of Option. This Option may not be transferred in
any manner otherwise than by will or by the laws of descent or distribution and
may be exercised during the lifetime of Optionee only by the Optionee. The terms
of the Plan and this Option Agreement shall be binding upon the executors,
administrators, heirs, successors and assigns of the Optionee.

        5. Term of Option. This Option may be exercised only within the term set
out in the Notice of Grant, and may be exercised during such term only in
accordance with the Plan and the terms of this Option Agreement.

        6. Tax Consequences. Some of the federal and California tax consequences
relating to this Option, as of the date of this Option, are set forth below.
THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE
SUBJECT TO CHANGE. THE OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING
THIS OPTION OR DISPOSING OF THE SHARES.

              (a)    Exercising the Option.

                (i)  Nonstatutory Stock Option.  The Optionee may incur 
regular federal income tax and California income tax liability upon exercise of
a NSO. The Optionee will be treated as having received compensation income
(taxable at ordinary income tax rates) equal to the excess, if any, of the Fair
Market Value of the Exercised Shares on the date of exercise over their
aggregate Exercise Price. If the Optionee is an Employee, the Company will be
required to withhold from his or her compensation or collect from Optionee and
pay to the applicable taxing authorities an amount equal to a percentage of this
compensation income at the time of exercise.

                (ii) Incentive Stock Option. If this Option qualifies as an ISO,
the Optionee will have no regular federal income tax or California income tax
liability upon its exercise, although


                                      -3-
<PAGE>   16
the excess, if any, of the Fair Market Value of the Exercised Shares on the date
of exercise over their aggregate Exercise Price will be treated as an adjustment
to alternative minimum taxable income for federal tax purposes and may subject
the Optionee to alternative minimum tax in the year of exercise. In the event
that the Optionee undergoes a change of status from Employee to Director or
Consultant, any Incentive Stock Option of the Optionee that remains unexercised
shall cease to qualify as an Incentive Stock Option and will be treated for tax
purposes as a Nonstatutory Stock Option on the ninety-first (91st) day following
such change of status.

              (b) Disposition of Shares.

                     (i)   NSO.  If the Optionee holds NSO Shares for at least 
one year, any gain realized on disposition of the Shares will be treated as
long-term capital gain for federal income tax purposes.

                     (ii) ISO. If the Optionee holds ISO Shares for at least one
year after exercise AND two years after the grant date, any gain realized on
disposition of the Shares will be treated as long-term capital gain for federal
income tax purposes. If the Optionee disposes of ISO Shares within one year
after exercise or two years after the grant date, any gain realized on such
disposition will be treated as compensation income (taxable at ordinary income
rates) to the extent of the excess, if any, of the LESSER OF (A) the difference
between the FAIR MARKET VALUE OF THE SHARES ACQUIRED ON THE DATE OF EXERCISE and
the aggregate Exercise Price, or (B) the difference between the SALE PRICE of
such Shares and the aggregate Exercise Price.

              (c) Notice of Disqualifying Disposition of ISO Shares. If the
Optionee sells or otherwise disposes of any of the Shares acquired pursuant to
an ISO on or before the later of (i) two years after the grant date, or (ii) one
year after the exercise date, the Optionee shall immediately notify the Company
in writing of such disposition. The Optionee agrees that he or she may be
subject to income tax withholding by the Company on the compensation income
recognized from such early disposition of ISO Shares by payment in cash or out
of the current earnings paid to the Optionee.

        By your signature and the signature of the Company's representative
below, you and the Company agree that this Option is granted under and governed
by the terms and conditions of the Plan and this Option Agreement. Optionee has
reviewed the Plan and this Option Agreement in their entirety, has had an
opportunity to obtain the advice of counsel prior to executing this Option
Agreement and fully understands all provisions of the Plan and Option Agreement.
Optionee hereby agrees to accept as binding, conclusive and final all decisions
or interpretations of the Administrator upon any questions relating to the Plan
and Option Agreement. Optionee further agrees to notify the Company upon any
change in the residence address indicated below.




                                      -4-
<PAGE>   17
OPTIONEE:                                CELERITEK, INC.



- ------------------------------------     By:------------------------------------
Signature

- ------------------------------------     Title:---------------------------------
Print Name

- ------------------------------------
Residence Address

- ------------------------------------





                                      -5-
<PAGE>   18
                                CONSENT OF SPOUSE

        The undersigned spouse of Optionee has read and hereby approves the
terms and conditions of the Plan and this Option Agreement. In consideration of
the Company's granting his or her spouse the right to purchase Shares as set
forth in the Plan and this Option Agreement, the undersigned hereby agrees to be
irrevocably bound by the terms and conditions of the Plan and this Option
Agreement and further agrees that any community property interest shall be
similarly bound. The undersigned hereby appoints the undersigned's spouse as
attorney-in-fact for the undersigned with respect to any amendment or exercise
of rights under the Plan or this Option Agreement.


                                        ----------------------------------------
                                        Spouse of Optionee


<PAGE>   19
                                    EXHIBIT A

                                 EXERCISE NOTICE


Celeritek, Inc.
3236 Scott Boulevard
Santa Clara, CA  95054-3090

Attention:  Secretary of the Company

        1. Exercise of Option. Effective as of today, _________________, 199___,
the undersigned ("Purchaser") hereby elects to purchase _________________ shares
(the "Shares") of the Common Stock of Celeritek, Inc. (the "Company") under and
pursuant to the Celeritek, Inc. 1994 Stock Option Plan (the "Plan") and the
Stock Option Agreement dated _____________, 19____ (the "Option Agreement"). The
purchase price for the Shares shall be $_____________, as required by the Option
Agreement.

        2. Delivery of Payment. Purchaser herewith delivers to the Company the
full purchase price for the Shares.

        3. Representations of Purchaser. Purchaser acknowledges that Purchaser
has received, read and understood the Plan and the Option Agreement and agrees
to abide by and be bound by their terms and conditions.

        4. Rights as Shareholder. Until the issuance (as evidenced by the
appropriate entry on the books of the Company or of a duly authorized transfer
agent of the Company) of the stock certificate evidencing such Shares, no right
to vote or receive dividends or any other rights as a shareholder shall exist
with respect to the Optioned Stock, notwithstanding the exercise of the Option.
A share certificate for the number of Shares so acquired shall be issued to the
Optionee as soon as practicable after exercise of the Option. No adjustment will
be made for a dividend or other right for which the record date is prior to the
date the stock certificate is issued, except as provided in Section 12 of the
Plan.

        5. Tax Consultation. Purchaser understands that Purchaser may suffer
adverse tax consequences as a result of Purchaser's purchase or disposition of
the Shares. Purchaser represents that Purchaser has consulted with any tax
consultants Purchaser deems advisable in connection with the purchase or
disposition of the Shares and that Purchaser is not relying on the Company for
any tax advice.

        6. Entire Agreement; Governing Law. The Plan and Option Agreement are
incorporated herein by reference. This Agreement, the Plan and the Option
Agreement constitute the entire agreement of the parties and supersede in their
entirety all prior undertakings and agreements of the

<PAGE>   20
Company and Purchaser with respect to the subject matter hereof, and such
agreement is governed by California law except for that body of law pertaining
to conflict of laws.


Submitted by:                            Accepted by:

PURCHASER:                               CELERITEK, INC.


- -------------------------------------    By:
Signature


- -------------------------------------    Its:
Print Name


Address:                                 Address:

- -------------------------------------    3236 Scott Boulevard
                                         Santa Clara, CA  95054-3090

- -------------------------------------



                                      -2-




<PAGE>   1
                                                                     EXHIBIT 5.1

                                CELERITEK, INC.
                                  May 7, 1998

Celeritek, Inc.
3236 Scott Boulevard
Santa Clara, California 95054

        RE:  REGISTRATION STATEMENT ON FORM S-8

Ladies and Gentlemen:

        We have examined the Registration Statement on Form S-8 to be filed by
you with the Securities and Exchange Commission on or about May 7, 1998 (the
"Registration Statement"), in connection with the registration under the
Securities Act of 1933, as amended, of 465,260 shares of your Common Stock (the
"Shares") reserved for issuance under the 1994 Stock Option Plan (the "Plan").
As your legal counsel, we have examined the proceedings taken and proposed to be
taken in connection with the issuance, sale and payment of consideration for the
Shares to be issued under the Plan.

        It is our opinion that, when issued and sold in compliance with
applicable prospectus delivery requirements and in the manner referred to in the
Plan and pursuant to the agreements which accompany the Plan, the Shares will be
legally and validly issued, fully paid and non-assessable.

        We consent to the use of this opinion as an exhibit to the Registration
Statement and further consent to the use of our name wherever appearing in the
Registration Statement and any amendments thereto.

                                        Sincerely,

                                        WILSON, SONSINI, GOODRICH & ROSATI
                                        Professional Corporation




<PAGE>   1
                                                                    EXHIBIT 23.1


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statement
(Form S-8) pertaining to the 1994 Stock Option Plan of Celeritek, Inc. of our
reports dated April 25, 1997, with respect to the consolidated financial
statements of Celeritek, Inc. incorporated by reference in its Annual Report
(Form 10-K) for the year ended March 31, 1997 and the related financial
statement schedule included therein, filed with the Securities and Exchange
Commission.


San Jose, California
May 7, 1998


<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-1998
<PERIOD-START>                             JUL-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                           4,373
<SECURITIES>                                     8,750
<RECEIVABLES>                                   11,698
<ALLOWANCES>                                       420
<INVENTORY>                                     10,156
<CURRENT-ASSETS>                                37,659
<PP&E>                                           6,862
<DEPRECIATION>                                  16,490
<TOTAL-ASSETS>                                  44,612
<CURRENT-LIABILITIES>                            9,354
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        24,349
<OTHER-SE>                                      10,367
<TOTAL-LIABILITY-AND-EQUITY>                    44,612
<SALES>                                         13,529
<TOTAL-REVENUES>                                13,529
<CGS>                                            8,591
<TOTAL-COSTS>                                    8,591
<OTHER-EXPENSES>                                 3,360
<LOSS-PROVISION>                                 1,578
<INTEREST-EXPENSE>                                   4
<INCOME-PRETAX>                                  1,699
<INCOME-TAX>                                       646
<INCOME-CONTINUING>                              1,053
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,053
<EPS-PRIMARY>                                      .15
<EPS-DILUTED>                                      .14
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          MAR-30-1997
<PERIOD-START>                             APR-01-1996
<PERIOD-END>                               JUN-30-1996
<CASH>                                           5,314
<SECURITIES>                                     7,525
<RECEIVABLES>                                    9,450
<ALLOWANCES>                                       549
<INVENTORY>                                      5,837
<CURRENT-ASSETS>                                29,986
<PP&E>                                          19,107
<DEPRECIATION>                                  13,750
<TOTAL-ASSETS>                                  35,386
<CURRENT-LIABILITIES>                            6,464
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        22,865
<OTHER-SE>                                       6,057
<TOTAL-LIABILITY-AND-EQUITY>                    35,386
<SALES>                                         11,518
<TOTAL-REVENUES>                                11,518
<CGS>                                            7,252
<TOTAL-COSTS>                                    7,252
<OTHER-EXPENSES>                                 2,950
<LOSS-PROVISION>                                   549
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                  1,460
<INCOME-TAX>                                       555
<INCOME-CONTINUING>                                905
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       905
<EPS-PRIMARY>                                      .13
<EPS-DILUTED>                                      .12
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
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<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               SEP-30-1996
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<PP&E>                                          20,319
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<CURRENT-LIABILITIES>                            7,702
<BONDS>                                              0
                                0
                                          0
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<TOTAL-REVENUES>                                11,657
<CGS>                                            7,355
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<OTHER-EXPENSES>                                 2,755
<LOSS-PROVISION>                                   549
<INTEREST-EXPENSE>                                   0
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<EPS-PRIMARY>                                      .15
<EPS-DILUTED>                                      .14
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
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<PERIOD-END>                               MAR-30-1997
<CASH>                                           7,033
<SECURITIES>                                     8,200
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<DEPRECIATION>                                  15,358
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<CURRENT-LIABILITIES>                            8,673
<BONDS>                                              0
                                0
                                          0
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<OTHER-SE>                                       8,808
<TOTAL-LIABILITY-AND-EQUITY>                    41,157
<SALES>                                         45,346
<TOTAL-REVENUES>                                45,346
<CGS>                                           28,918
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<EPS-PRIMARY>                                      .52
<EPS-DILUTED>                                      .50
        

</TABLE>


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