LOGIC DEVICES INC
S-3/A, 1997-01-07
SEMICONDUCTORS & RELATED DEVICES
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  As filed with the Securities and Exchange Commission on   January 6, 1997    
                                      Registration No. 333-16591     

                SECURITIES AND EXCHANGE COMMISSION
                      WASHINGTON, D.C.  20549

             Pre-Effective Amendment No.1 to      FORM S-3

                      REGISTRATION STATEMENT
                               UNDER
                    THE SECURITIES ACT OF 1933
                       _____________________

                    LOGIC DEVICES INCORPORATED
      (Exact name of Registrant as specified in its charter)

         CALIFORNIA                          94-2893789
 (State or other jurisdiction of   (I.R.S. Employer Identification
 incorporation or organization)                Number)

                        1320 Orleans Drive     
                   Sunnyvale, California  94089
                          (408) 542-5400      
  (Address, including zip code and telephone number, including
      area code, of Registrant's principal executive offices)
                      ______________________

                          William J. Volz
                             President
                    Logic Devices Incorporated
                        1320 Orleans Drive     
                   Sunnyvale, California  94089
                          (408) 542 5400      
   (Name and address, including zip code, and telephone number,
            including area code, of agent for service)
                      _______________________
                            COPIES TO:

                       David R. Selmer, Esq.
             Barack, Ferrazzano, Kirschbaum & Perlman
                       333 West Wacker Drive
                            Suite 2700
                     Chicago, Illinois  60606
                          (312) 984-3155     

 Approximate date of commencement of proposed sale to the public:  As soon
 as possible after the Registration Statement becomes effective.

     If the only securities being registered on this form are being offered
 pursuant to dividend or interest reinvestment plans, please check the
 following box.  <square>

     If any of the securities being registered on this form are to be
 offered on a delayed or continuous basis pursuant to Rule 415 under the
 Securities Act of 1933, other than securities offered only in connection
 with dividend or interest reinvestment plans, check the following box.
 <checked-box>

     If this Form is filed to register additional securities for an
 offering pursuant to Rule 462(b) under the Securities Act, the following
 box and list the Securities Act registration statement number of earlier
 effective registration statement for the same offering. <square>

     If this Form is a post-effective amendment filed pursuant to Rule
 462(c) under the Securities Act, check the following box and list the
 Securities Act registration statement number of the earlier effective
 registration statement for the same offering.  <square> 

     If delivery of the prospectus is expected to be made pursuant to Rule
 434, please check the following box.<square>

                  CALCULATION OF REGISTRATION FEE

 Title of Each Class
 of Securities
 to be Registered..............Common Stock, no par value

 Amount to be
 Registered(1).................1,919,014

 Proposed Maximum
 Offering Price
 Per Share(2)..................$2.16

 Proposed Maximum
 Aggregate Offering
 Price(2)......................$4,145,070.20

 Amount of
 Registration Fee(2)...........$1,257.00

                   [Continued on the next Page]
<PAGE>
 (1) Consisting of (i) 1,784,664 shares of Common Stock and (ii) 134,350
     additional shares of Common Stock issuable upon exercise of warrants
     to purchase Common Stock being registered on this form and an
     indeterminate number of additional shares of Common Stock issuable
     pursuant to the antidilution provisions of these warrants.

 (2) Estimated solely for the purpose of calculating the registration fee
     pursuant to Rule 457(c) promulgated under the Securities Act of 1933,
     as amended (the "Securities Act"), and the average of the high and low
     sales prices as reported on the National Association of Securities
     Dealers Automated Quotation National Market System for November 20,
     1996.

 The Registrant hereby amends this Registration Statement on such date or
 dates as may be necessary to delay its effective date until the Registrant
 shall file a further amendment which specifically states that this
 Registration Statement shall thereafter become effective in accordance
 with Section 8(a) of the Securities Act of 1933 or until the Registration
 Statement shall become effective on such date as the Commission, acting
 pursuant to said Section 8(a), may determine.
<PAGE>
                       SUBJECT TO COMPLETION
            PRELIMINARY PROSPECTUS DATED     JANUARY 6,1997    

                    LOGIC DEVICES INCORPORATED

                 1,919,014 SHARES OF COMMON STOCK


     This Prospectus relates to (i) 1,784,664 shares of common stock, no
 par value per share (the "Common Stock"), of Logic Devices Incorporated
 (the "Company") and (ii) 134,350 additional shares of Common Stock
 issuable upon exercise of certain warrants (the "Warrants") to purchase
 Common Stock which shares and Warrants are held by the "Selling
 Shareholders" identified herein (the "Offered Securities").  Warrants for
 2,500 shares are exercisable for a period ending August 21, 1998, a
 Warrant for 31,850 shares is exercisable for a period ending September 19,
 1998 and a Warrant to purchase 100,000 shares is exercisable for a period
 ending February 15, 2000.  See "Subsequent Events."

     The Offered Securities may be offered from time to time by the
 "Selling Shareholders" or their pledgees, donees, transferees or other
 successors in interest.  See "Selling Shareholders."  THE SELLING
 SHAREHOLDERS HAVE ADVISED THE COMPANY THAT SALES OF THE OFFERED SECURITIES
 MAY BE MADE, IF AT ALL, FROM TIME TO TIME AFTER THE EFFECTIVE DATE OF THE
 REGISTRATION STATEMENT OF WHICH THIS PROSPECTUS IS A PART, THROUGH THE
 REGISTRATION STATEMENT OF WHICH THIS PROSPECTUS IS A PART OR RULE 144 OF
 THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), IN THE
 OVER-THE-COUNTER MARKET THROUGH LICENSED BROKER-DEALERS OR OTHERWISE, AT
 THE THEN PREVAILING MARKET PRICES OR OTHERWISE AT PRICES AND ON TERMS THEN
 OBTAINABLE OR THROUGH PRIVATELY NEGOTIATED TRANSACTIONS.  NO PERIOD OF
 TIME HAS BEEN FIXED WITHIN WHICH THE OFFERED SECURITIES COVERED BY THIS
 PROSPECTUS MAY BE OFFERED OR SOLD.  SEE "PLAN OF DISTRIBUTION."

     The Company will receive no part of the proceeds of any sales of the
 Offered Securities except for the exercise price of the Warrants.  The
 Company will pay all expenses with respect to this Offering, except for
 underwriting discounts, brokerage fees and commissions and transfer taxes
 for the Selling Shareholders, which will be borne by the Selling
 Shareholders.

 INVESTMENT IN THE SECURITIES OFFERED HEREBY INVOLVES A HIGH DEGREE OF RISK.
                        SEE "RISK FACTORS."

       The Company's Common Stock is traded in the national over-the-counter
 market and prices are quoted by the National Association of Securities
 Dealers Automated Quotation ("Nasdaq") National Market System under the
 symbol LOGC.  On 
    
    Janaury 3, 1997,     the last reported sale price of the
 Common Stock, as reported by the Nasdaq National Market System, was   
 $ 2 7/16    .[/R]


 THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
  AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
  SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
        PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
       ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

    THE ATTORNEY GENERAL OF THE STATE OF NEW YORK HAS NOT PASSED ON OR
 ENDORSED THE MERITS OF THIS OFFERING.  ANY REPRESENTATION TO THE CONTRARY
                               IS UNLAWFUL.



         THE DATE OF THIS PROSPECTUS IS              , 1997
<PAGE>
     No person has been authorized to give any information or to make any
 representations not contained or incorporated by reference in this
 Prospectus in connection with the Offered Securities and, if given or
 made, such information and representations must not be relied upon as
 having been authorized by the Company or the Selling Shareholders.
 Neither the delivery of this Prospectus nor any sale made under this
 Prospectus shall under any circumstances create any implication that there
 has been no change in the affairs of the Company since the date hereof or
 since the date of any documents incorporated herein by reference.  This
 Prospectus does not constitute an offer to sell or a solicitation of an
 offer to buy any securities other than the securities to which it relates,
 or an offer or solicitation in any state to any person to whom it is
 unlawful to make such offer in such state.


                       AVAILABLE INFORMATION

     The Company is subject to the informational requirements of the
 Securities Exchange Act of 1934, as amended (the "Exchange Act"), and in
 accordance therewith files reports, proxy statements and other information
 with the Securities and Exchange Commission (the "Commission").  Such
 reports, proxy statements and other information filed by the Company may
 be examined without charge at, or copies obtained upon payment of
 prescribed fees from, the Public Reference Section of the Commission at
 Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549 and are
 also available for inspection and copying at the regional offices of the
 Commission located at 75 Park Place, 14th Floor, New York, New York 10007
 and at Citicorp Center, Suite 1400, 500 West Madison Street, Chicago,
 Illinois 60661-2511.

     The Company has filed with the Commission, 450 Fifth Street N.W.,
 Washington, D.C. 20549, a Registration Statement on Form S-3 under the
 Securities Act, and the rules and regulations promulgated thereunder, with
 respect to the Common Stock offered pursuant to this Prospectus.  This
 Prospectus, which is part of the Registration Statement, does not contain
 all of the information, exhibits and undertakings set forth in the
 Registration Statement, certain portions of which are omitted as permitted
 by the Rules and Regulations of the Commission.  For further information
 concerning the Company and the Common Stock offered hereby, reference is
 made to the Registration Statement and the exhibits filed therewith, which
 may be examined without charge at, or copies obtained upon payment of
 prescribed fees from, the Commission and its regional officers at the
 locations listed above.  Any statements contained herein concerning the
 provisions of any document are not necessarily complete, and, in each
 instance, reference is made to the copy of such document filed as an
 exhibit to the Registration Statement or otherwise filed with the
 Commission.  Each such statement is qualified in its entirety by such
 reference.

                DOCUMENTS INCORPORATED BY REFERENCE

     The following documents filed with the Commission are incorporated by
 reference in this Prospectus:

     (1)  the Company's Annual Report on Form 10-K and Form 10-K/A for the
 year ended December 31, 1995 (File No. 0-17187);
     (2)  all other reports filed pursuant to Section 13(a) of the Exchange
 Act since the end of the fiscal year covered by the Annual Report referred
 to in (1) above.
     (3)  the description of the Company's Common Stock contained in its
 Registration Statement on Form S-18, as amended (File No. 33-23763-LA).
<PAGE>
     All documents filed by the Company with the Commission pursuant to
 Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of
 this Prospectus and prior to the termination of this Offering shall be
 deemed to be incorporated by reference in this Prospectus and to be a part
 hereof from the date of filing of such documents (such documents, and the
 documents enumerated above, are hereinafter referred to as "Incorporated
 Documents").  Any statement contained in an Incorporated Document shall be
 deemed to be modified or superseded for purposes of this Prospectus and
 the Registration Statement of which it is a part to the extent that a
 statement contained herein or in any other subsequently filed Incorporated
 Document or in an accompanying prospectus supplement modifies or
 supersedes such statement.  Any such statement so modified or superseded
 should not be deemed, except as so modified or superseded, to constitute a
 part of this Prospectus or the Registration Statement.

     The Company will, without charge, provide to each person (including
 any beneficial owner) to whom this Prospectus is delivered, upon the
 written or oral request of such person, a copy of any and all of the
 Incorporated Documents (not including exhibits unless such exhibits are
 specifically incorporated by reference into the information that this
 Prospectus incorporates).  Requests for such information should be
 directed to the Chief Financial Officer at the address and telephone
 number set forth under "The Company."


                           RISK FACTORS

     Investment in the Common Stock involves a high degree of risk.
 Prospective investors should carefully consider the following risk factors
 in evaluating the Company and its business before investing in the Common
 Stock.

     DEPENDENCE ON NEW PRODUCTS AND TECHNOLOGIES.  The Company's future
 success will depend, in large part, upon its ability to successfully
 develop and market new products, and to have access to leading edge
 semiconductor wafer fabrication process technology.  The Company serves a
 number of small or niche markets which each require constant monitoring
 and evaluation by the Company.  Semiconductor design and process
 technologies are subject to rapid technological change, requiring a high
 level of expenditure for research and development.  Further, even if
 successfully developed, the success of new product introductions is
 dependent on several factors, including proper new product selection,
 timely product introduction, achievement of acceptable production yields
 and market acceptance. There can be no assurance that the Company will
 successfully develop new products that can be introduced on a timely or
 cost-effective basis or that will achieve market acceptance.

     DEPENDENCE ON OUTSIDE WAFER FOUNDRIES AND TECHNOLOGY.  The Company is
 dependent on outside silicon foundries, two located in Japan, one located
 in Taiwan, one located in Germany and one located in the U.S., for its
 silicon wafer fabrication. While the Company can obtain wafers used in
 many of its current products from any of these five sources, each source
 uses a different technological process.  During 1992, the Company
 redesigned its static random access memories ("SRAM") product line and
 initiated product designs with two of its current foundries as a result of
 the termination of a guaranteed supply arrangement with a domestic
 supplier, and during the end of 1995 and the beginning of 1996, the
 Company redesigned its Digital Signal Processing ("DSP") product line and
 initiated product designs with another of its current foundries as a
 result of the Company's inability to obtain adequate quantities of
 processed wafers.  While the Company regularly evaluates the availability
 of additional sources of processed wafers, there can be no assurance that
 other foundries will be available or, if available, will be able to supply
 wafers on a timely basis or provide a process which is technologically
 comparable or as cost-effective as the process used by the Company's
 current foundries.  Other semiconductor companies pursuing outside wafer
 fabrication may enter into supply contracts which guarantee certain
<PAGE>
 capacity to the semiconductor company, but require minimum purchase
 commitments.  To date, the Company has not committed itself to minimum
 purchases although it does have supply contracts with two of its current
 foundries.  The Company's reliance on outside foundries involves several
 other risks, including reduced control over delivery schedules, quality
 assurance and costs.

     It is not unusual in the semiconductor industry to experience
 disruptions in the supply of processed wafers due to quality or yield
 problems.  For this reason the Company has historically maintained a high
 inventory level of processed wafers.  There can be no assurance that such
 a material disruption in supply will not occur.  Further, if the Company's
 foundries are unable or unwilling to produce adequate supplies of
 processed wafers, the Company's business would be adversely affected.  In
 such an event the Company would incur delay and expense to redesign its
 circuits to be compatible with a new manufacturer's complementary metal-
 oxide-silicon ("CMOS") process.

     CYCLICAL NATURE OF SEMICONDUCTOR INDUSTRY.  The semiconductor industry
 has historically been characterized by repeated and severe business
 cycles.  The industry is characterized by a number of factors, including
 fluctuation in user demand, price volatility, variations in manufacturing
 capacity and efficiencies, rapid technological change and significant
 process and product development.  The Company expects that as it
 introduces a broader range of products, including more standard or
 commodity products, the cyclical nature of the semiconductor industry may
 have greater impact on the Company's business and operating results in the
 future and may cause greater fluctuations in the Company's period-to-
 period performance.

     COMPETITION.  The semiconductor industry is intensely competitive and
 is characterized by rapid technological change, product obsolescence,
 fluctuations in both demand and capacity and price erosion. These factors
 can render obsolete the processes and products currently utilized or
 produced by the Company.  In such cases, the Company will be required to
 develop products utilizing new processes and may be required to establish
 new foundry relationships.  The Company faces competition from other
 manufacturers of high-performance integrated circuits, many of which have
 advanced technological capabilities, are currently increasing their
 participation in the high-performance CMOS market and have internal wafer
 fabrication capabilities.  The ability of the Company to compete in this
 rapidly evolving environment depends on elements both within and outside
 the control of the Company.  These elements include:  the Company's
 ability to develop new products in a timely manner; the cost effectiveness
 of its manufacturing; successful introduction to and acceptance by
 customers of new products; the speed at which customers incorporate the
 Company's products into their systems; continued access to advanced
 semiconductor foundries and leading edge CMOS process technology; the
 number and capabilities of the Company's competitors as well as general
 economic conditions.  The Company experiences competition from a number of
 domestic and international companies, most of which have substantially
 greater financial, technical, manufacturing and marketing resources than
 the Company.  Emerging companies also are attempting to obtain a share of
 the existing market.  To the extent that the Company's products achieve
 market acceptance, other manufacturers may seek to offer competitive
 products or embark on pricing strategies which could have adverse effects
 on the Company's operating results.

     DEPENDENCE ON KEY PERSONNEL.  The Company's continued success is
 dependent in part upon a number of key management personnel and technical
 employees, the loss of one or more of whom could adversely affect the
 Company.  The Company believes that its future success will depend in part
 on its ability to attract, retain and motivate highly skilled employees,
 who are in great demand in the semiconductor industry.  The Company does
 not have any employment agreements with any of its key employees.
<PAGE>
     DEPENDENCE ON SUBCONTRACT ASSEMBLY.  The Company is dependent on
 outside subcontract assembly for the assembly of the Company's products.
 The Company's products are assembled by several independent subcontractors
 in the United States and the Far East.  Shortages of raw materials or
 disruption in the provision of services by the Company's assembly
 subcontractors, or other circumstances that would require the Company to
 seek alternative sources of supply, could lead to constraints or delays in
 the timely delivery of the Company's products.  Such constraints or delays
 could result in the loss of customers, reductions in the Company's
 revenue, or other adverse effects on the Company's operating results.  The
 Company's reliance on subcontract assembly involves several other risks,
 including reduced control over delivery schedules, quality assurance and
 costs.

     DEPENDENCE ON FEW CUSTOMERS.  In 1995, three customers each accounted
 for 10% or more of net revenues.  The loss of any major customer or a
 substantial reduction in sales from such a customer could adversely affect
 the Company.

     DEPENDENCE UPON INDEPENDENT DISTRIBUTORS AND SALES REPRESENTATIVES.
 Much of the Company's sales are generated by electronics distributors and
 independent sales representatives that are not under the direct control of
 the Company.  See "The Company."  These electronics distributors generally
 represent product lines offered by several companies, including
 competitive product lines, and thus could reduce their sales efforts
 applied to the Company's products or terminate their representation of the
 Company.

     CONTROL BY SHAREHOLDERS.  Certain of the Company's shareholders
 currently are able to exert a significant measure of control over the
 affairs and policies of the Company if they act together.

     VOLATILITY OF STOCK PRICE.  There has been significant volatility in
 the market price of securities of electronics companies in general, and
 semiconductor technology companies in particular, including the Company.
 Various factors and events, including announcements or developments by the
 Company or other companies engaged in the semiconductor or related
 industries concerning, among other things, suppliers, customers, financial
 results, product developments, patents, or proprietary rights may have a
 significant impact on the Company's business and on the market price of
 the Common Stock.

     IMPACT OF FUTURE SALES ON MARKET PRICE OF COMMON STOCK.  Based on
 6,221,750 shares outstanding (assuming  exercise of all currently
 outstanding options and warrants), the number of shares of Common Stock
 offered hereby represents approximately 31% of the total number of shares
 of Common Stock outstanding.  The Selling Shareholders own 1,919,014
 shares of Common Stock, including shares obtainable through the exercise
 of the Warrants, all of which shares are being registered for sale
 hereunder.  See "Selling Shareholders" and "Plan of Distribution."  If the
 Selling Shareholders or the Company's other shareholders, under Rule 144
 or otherwise, were to make available for sale or sell a large amount of
 Common Stock in the market at one time, the market price of the Common
 Stock could be adversely affected.  Furthermore, other sales of
 substantial amounts of the Company's Common Stock in the public market, or
 even the potential for such sales, could adversely effect prevailing
 market prices for the Company's Common Stock.

     INTERNATIONAL TRADE AND CURRENCY EXCHANGE.  Many of the materials and
 manufacturing steps in the Company's products are supplied by foreign
 companies.  Also, approximately 20%, 18% and 19% of the Company's net
 sales in 1995, 1994 and 1993, respectively, were to international
 customers.  Accordingly, both manufacturing and sales of the Company's
 products may be adversely affected by political or economic conditions
 abroad.  The Company's international sales are billed in United States
 dollars and therefore settlements are not directly subject to currency
 exchange fluctuations.  However, changes in the relative value of the
 dollar may create pricing pressures for the Company's products.  In
<PAGE>
 addition, various forms of protectionist trade legislation have been
 proposed in the United States and certain foreign countries.  A change in
 current tariff structures or other trade policies could adversely affect
 the Company's international customers or decrease the cost of products
 from the Company's international competitors.

     PROTECTION OF PROPRIETARY INFORMATION.  The Company has been awarded
 one patent by the United States Patent Office and has acquired additional
 patents as part of its acquisition of certain assets of Star Semiconductor
 Corporation ("Star"); however, the Company relies primarily on its design
 know-how and continued access to advanced CMOS process technology, rather
 than on patents, to develop and maintain its competitive position.  There
 can be no assurance that the Company will continue to have access to
 advanced semiconductor process technology or that others will not develop,
 patent or gain access to similar know-how and technology, or reverse
 engineer the Company's products.  The Company attempts to protect its
 trade secrets and other proprietary information through confidentiality
 agreements with employees, consultants, suppliers and customers, but there
 can be no assurance that those measures will be adequate to protect the
 Company's interests. Others in the semiconductor industry have obtained
 patents covering a variety of semiconductor designs and processes, and the
 Company has from time to time received and may in the future receive
 notices from third parties asserting that one or more aspects or uses of
 the Company's products is infringing such third parties' patent rights.
 Presently there are no such claims pending against the Company.  Although
 the Company does not believe that it infringes any known patents at this
 time, if any such infringement exists, the Company may be liable for
 damages and may find it necessary or desirable to obtain licenses under
 third parties' patents.  Based on industry practice, the Company believes
 that, in most cases, any necessary licenses could be obtained on
 conditions that would not materially adversely affect the Company, but
 there can be no assurances that such licenses could be obtained or that
 litigation would not occur.  The inability of the Company to obtain such
 licenses or the occurrence of litigation could adversely affect the
 Company.

                            THE COMPANY

     Logic Devices Incorporated (the "Company") designs and markets high-
 performance digital integrated circuits.  The Company's circuits address
 applications which require high computational speeds, high-reliability,
 high levels of circuit integration (complexity) and low power consumption.
 The Company's products are incorporated into products manufactured by OEMs
 and utilized in high-speed electronic computational applications in
 computers and work stations, broadcast and medical video image processing,
 and telecommunication systems.  The Company's product strategy is to
 develop and market industry standard circuits which offer superior
 performance, as well as Company proprietary circuits to meet specific
 customer needs.

     The Company currently offers products in two areas: (1) DSP (digital
 signal processing) circuits consisting of high-performance arithmetic
 computational functions (multipliers, arithmetic-logic units "ALUs",
 special math functions applicable to digital signal processing
 computations and programmable DSP multiple processor units); and (2) high-
 speed SRAMs (static random access memories) including FIFO (first in/first
 out) Memories.  As of December 31, 1995, the Company offered 45 catalog
 products which are sold to a diverse customer base.  With the multiplicity
 of packaging and performance options, the 45 basic products result in
 nearly 800 catalog items.

     The Company's plug compatible catalog products are designed to replace
 existing industry standard integrated circuits offering superior
 performance, lower power consumption and reduced cost.  Proprietary
 catalog products are developed by the Company to address specific
 functional application needs or performance levels that are not otherwise
 commercially available.  The Company seeks to provide related groups of
 circuits that OEMs purchase for incorporation into high-performance
 electronic systems.
<PAGE>
     The Company relies on third party silicon foundries to process silicon
 wafers, each wafer having up to several hundred integrated circuits of a
 given Company design, from which finished products are then assembled.
 The Company's strategy is to outsource wafer processing to third party
 foundries in order to avoid the substantial investment in capital
 equipment required to establish a wafer fabrication facility.  The Company
 works closely with the foundries in order to take advantage of their
 processing capabilities and continues to explore and develop additional
 foundry relationships in order to minimize its dependence on any single
 relationship.

     The Company markets its products worldwide through its own direct
 sales force, a network of 34 national and international independent sales
 representatives and 20 international and domestic distributors.  In 1995,
 approximately 45% of the Company's net revenues were derived from OEMs,
 while sales through foreign and domestic distributors accounted for
 approximately 55% of net revenues.  Among the Company's OEM customers are
 Bull HN, Solectron Corporation, Loral Systems, Inc., Abekas Video Systems,
 Inc., IBM Corporation, General Dynamics Corporation, DSC Communications
 Corporation, Advanced Technology Laboratories, Inc. and Acuson
 Corporation.  Approximately 80% of the Company's net revenues have
 historically been derived from the United States and approximately 20%
 have been derived from foreign sales.

     The Company was incorporated under the laws of the State of California
 in April 1983.  The Company's principal offices are located at 1320
 Orleans Drive, Sunnyvale, California 94089, and its telephone number is
 (408) 542-5400.

                         SUBSEQUENT EVENTS

     The following events have occurred since December 31, 1995, which
 updates information contained in the Company's Annual Report on Form 10-K
 and Form 10-K/A for the fiscal year ended December 31, 1995 (the "1995
 Annual Report"):

     GRANT, EXERCISE AND TRANSFER OF WARRANTS.  On February 15, 1995, the
 non-employee directors of the Company were granted warrants to purchase an
 aggregate of 220,000 shares of Common Stock.  The grants were ratified by
 shareholders of the Company at the Company's 1995 annual meeting of
 shareholders held June 13, 1995.  The warrants have an exercise price of
 $2.5625 per share, which was the last reported transaction price of the
 Common Stock on February 15, 1995, and expire on February 15, 2000.  Two
 of the Warrants representing an aggregate of 120,000 shares of Common
 Stock were exercised in July, 1996 and the remaining Warrant has been
 transferred to a non-director.  The Company extended recourse loans for
 the exercise price of the Warrants to the parties exercising the Warrants.
 The shares of Common Stock received on the exercise also have been pledged
 as security on such loans.  The shares of Common Stock issued on exercise
 of these Warrants and the shares underlying the remaining Warrant are
 being registered herein.  Certain other Warrants to purchase an aggregate
 of 34,350 shares of Common Stock were issued by the Company in connection
 with private placements conducted in August and September of 1995,
 respectively.  Under one transaction, a Warrant giving the holder the
 right to purchase from the Company up to 31,850 shares of Common Stock at
 an exercise price equal to $12.625 per share (the last reported
 transaction price on August 21, 1995) was issued.  The Warrant was
 exercisable immediately upon its issuance and expires on August 21, 1998.
 Under the other transaction, Warrants giving the holders the right to
 purchase from the Company up to an aggregate of 2,500 shares of Common
 Stock at an exercise price equal to $11.875 per share (the closing bid
<PAGE>
 price on September 14, 1995) were issued.  These Warrants were exercisable
 immediately upon their issuance and expire on September 19, 1998.  The
 shares underlying each of these Warrants are being registered herein.  All
 of the Warrants granted in these transactions are transferable by the
 holders thereof in accordance with applicable securities laws.

     ELECTION OF DIRECTORS.  At the Company's annual meeting of
 shareholders held August 1, 1996, a Board of five Directors was elected:
 Howard L. Farkas, Burton W. Kanter, Bruce B. Lusignan, Albert Morrison,
 Jr. and William J. Volz.  Dr. Lusignan is a new member to the Company's
 Board of Directors and is Director of the Communications Satellite
 Planning Center, a research laboratory of Stanford University's Electrical
 Engineering Department.  The other four members have been Directors since
 1983 and Mr. Volz is the Company's President and Chief Operating Officer.

      LEASE OF SPACE.  The Company recently signed a lease with respect to
 premises located at 1320 Orleans Drive, Sunnyvale, California and 
    
   took    
 possession of the premises    in     December 1996.  The lease has a six year
 term beginning upon the Company taking possession of the premises.  The
 premises consist of approximately 21,500 square feet and will house the
 Company's main corporate offices and facilities for the Company's research
 and development efforts, engineering, testing and assembly of its
 semiconductor products.  The lease is triple net and the monthly base rent
 will be approximately $26,300.00 for each of the first 12 months of the
 lease increasing thereafter in accordance with the Consumer Price Index on
 the basis set forth in the lease.  The Company believes that the premises
 will be sufficient to meet its needs both currently and for the term of
 the lease.

                          USE OF PROCEEDS

     The Company will not receive any proceeds from the sale of any of the
 Offered Securities by the Selling Shareholders.  The Company will receive
 proceeds from the sale of Common Stock issuable upon exercise of the
 Warrants if such Warrants are exercised, but only in an amount equal to
 the exercise price thereof multiplied by the number of shares purchased
 upon the exercise of the Warrants.  If all the Warrants are exercised, the
 Company would receive net proceeds of $688,043.75.  The Company expects to
 use any such proceeds for working capital and general corporate purposes.


                       SELLING SHAREHOLDERS

     The following table sets forth additional information as of     January 6,
 1997,     regarding the Selling Shareholders' ownership of Common Stock:
<PAGE>
                                                      NUMBER OF
                                NUMBER     SHARES         SHARES
                                OF         COVERED     NOT COVERED
 NAME OF                        SHARES     BY THIS       BY THIS
 RECORD OWNER                   OWNED     PROSPECTUS    PROSPECTUS

 Aries Peak, Inc.(1)            1,250(2)     1,250           0

 BRT Partnership(3)           319,482      319,482           0

 CIBC Trust Company (Bahamas)
  Limited, as Trustee         100,000(2)   100,000           0

 Farkas, Howard(4)            100,000      100,000           0

 First Bermuda Securities
  Limited(1)                   31,850(2)    31,850           0

 Hellerstein, Stephen,
  as Trustee(5)               749,305      749,350           0

 Kanter Family Foundation(6)   50,000       50,000           0

 Morrison, Albert, Jr.(7)      20,877       20,877           0

 Pacific Miners Ltd.(1)         1,250(2)     1,250           0

 Walnut Capital Corp.(8)       45,000       45,000           0

 Windy City, Inc.(9)          500,000      500,000           0

     TOTAL                  1,919,014    1,919,014           0

 (1)  Placement agent for certain shares of Company common stock
      during 1995.
 (2)  Represents shares obtainable through Warrant exercise.
 (3)  An Illinois general partnership, the partners of which are 25 
      irrevocable trusts of which Solomon A. Weisgal is the sole trustee,
      held for the benefit of various members of Burton Kanter's extended
      family but excluding Mr. Kanter.  Mr. Kanter is a director of the
      Company.
 (4)  Mr. Farkas is a director of the Company.
 (5)  Mr. Hellerstein is the Trustee of 15 irrevocable trusts, the
      beneficiaries of which consist of Mr. Farkas and members of
      his family.
 (6)  The Kanter Family Foundation is a non-profit, charitable
      foundation, the directors of which are Mr. Morrison, a
      director of the Company, and sons of Mr. Kanter and the
      officers of which are members of Mr. Kanter's family.
 (7)  Mr. Morrison is a director of the Company.
 (8)  Mr. Kanter is a director and the Chief Executive Officer of
      Walnut Capital Corp.
 (9)  The BRT Partnership owns 100% of the outstanding common
      stock of Windy City, Inc. which constitutes all of the
      currently outstanding voting stock of Windy City, Inc.

                       PLAN OF DISTRIBUTION

     The Offered Securities may be sold from time to time by the Selling
 Shareholders or their pledgees, donees, transferees or other successors in
 interest in one or more transactions at a fixed offering price, at varying
 prices determined at the time of sale or at negotiated prices.  Such sales
 may be made to purchasers directly by the Selling Shareholders (or their
 pledgees, donees, transferees or other successors in interest) or,
 alternatively, the Selling Shareholders (or their pledgees, donees,
 transferees or other successors in interest) may offer the Offered
 Securities, pursuant to Registration Statement of which this Prospectus is
 a part or Rule 144 of the Securities Act, through underwriters, dealers,
 brokers or agents, who may receive compensation in the form of
 underwriting discounts, concessions or commissions from the Selling
 Shareholders (or their pledgees, donees, transferees or other successors
 in interest) and/or the purchasers of the Offered Securities for whom they
 may act as agents.  In effecting sales of Offered Securities, brokers or
<PAGE>
 dealers may arrange for other brokers or dealers to participate.  Such
 brokers or dealers and any other participating brokers or dealers may be
 deemed to be underwriters within the meaning of the Securities Act in
 connection with such sales.  Sales of Common Stock may be made through
 Nasdaq or otherwise at prices and at terms then prevailing or in
 negotiated transactions.

     The Company has agreed to indemnify the Selling Shareholders against
 certain liabilities in connection with the distribution of the Offered
 Securities, including liabilities under the Securities Act.  Under
 agreements that may be entered into by the Selling Shareholders, brokers
 or dealers who participate in the distribution of the Offered Securities
 may be entitled to indemnification by the Selling Shareholders and the
 Company against certain liabilities, including liabilities under the
 Securities Act.


                           LEGAL MATTERS

     The validity of the Offered Securities has been passed upon by Barack,
 Ferrazzano, Kirschbaum & Perlman, Chicago, Illinois.


                              EXPERTS

     The financial statements and the related supplemental schedules
 incorporated into this Prospectus by reference to the Company's Annual
 Report on Form 10-K for the year ended December 31, 1995, as amended, have
 been so incorporated in reliance upon the report of Meredith, Cardozo &
 Lanz, independent accountants, given upon the authority of said firm as
 experts in auditing and accounting.
<PAGE>

 NO   DEALER,  SALESPERSON  OR
 OTHER   INDIVIDUAL  HAS  BEEN
 AUTHORIZED    TO   GIVE   ANY
 INFORMATION   OR   MAKE   ANY
 REPRESENTATIONS NOT CONTAINED
 IN    THIS   PROSPECTUS    IN
 CONNECTION  WITH THE OFFERING
 COVERED  BY THIS  PROSPECTUS.
 IF   GIVEN  OR   MADE,   SUCH
 INFORMATION OR REPRESENTATIONS
 MUST NOT  BE  RELIED  UPON AS
 HAVING BEEN AUTHORIZED BY THE
 COMPANY. THIS PROSPECTUS DOES
 NOT  CONSTITUTE  AN OFFER  TO
 SELL, OR A SOLICITATION OF AN                  LOGIC DEVICES 
 OFFER TO BUY, THE COMMON STOCK                 INCORPORATED
 IN ANY JURISDICTION WHERE, OR
 TO ANY PERSON TO WHOM,  IT IS
 UNLAWFUL  TO  MAKE  ANY  SUCH
 OFFER OR SOLICITATION. NEITHER
 THE    DELIVERY    OF    THIS
 PROSPECTUS  NOR ANY SALE MADE
 HEREUNDER  SHALL,  UNDER  ANY
 CIRCUMSTANCES,    CREATE   AN
 IMPLICATION THAT THERE HAS NOT
 BEEN ANY CHANGE IN  THE FACTS
 SET  FORTH IN THIS PROSPECTUS
 OR  IN  THE  AFFAIRS  OF  THE
 COMPANY SINCE THE DATE HEREOF.

                                               1,919,014 shares of
                                                  Common Stock





       TABLE OF CONTENTS

                          PAGE
 Available Information       2

 Documents   Incorporated   By
 Reference                   2               ________________________

 Risk Factors                3                      PROSPECTUS

 The Company                 6               ------------------------

 Subsequent Events           7

 Use of Proceeds             8

 Selling Shareholders        8

 Plan of Distribution        9

 Legal Matters               9

 Experts                     9

                                            __________________,1997

<PAGE>
                              PART II

              INFORMATION NOT REQUIRED IN PROSPECTUS

 ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The following table sets forth those expenses for distribution to be
 incurred in connection with the issuance and distribution of the
 securities being registered.

 Registration Fee                              $   1,257.00
 Legal Fees and Expenses                       $  10,000.00
 Accounting Fees and Expenses                  $     500.00
 Miscellaneous                                 $     234.00

 Total                                         $  12,000.00

     All expenses are estimated except the Registration Fee.

 ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

     The Registrant's Articles of Incorporation and Bylaws require the
 Registrant to indemnify officers and directors of the Registrant to the full
 extent permitted by Section 317 of the California General Corporation Law.
 Section 317 of the California General Corporation law makes provisions for
 the indemnification of officers, directors and other corporate agents in
 terms sufficiently broad to indemnify such persons, under certain
 circumstances, for liabilities (including reimbursement of expenses incurred)
 arising under the Securities Act.

 ITEM 16.  EXHIBITS

     Exhibit
       NO.          DESCRIPTION

        3.1*        Articles of Incorporation of Logic Devices Incorporated,
                    as amended.  Incorporated by reference to Ex. 3.1 of the
                    Registrant's Form S-18 Registration Statement (File No.
                    33-23763-LA)
        3.2*        Bylaws of Logic Devices Incorporated.  Incorporated by
                    reference to Ex. 3.2 of the Registrant's Form S-18
                    Registration Statement (File No. 33-23763-LA)
        4.1*        Form of certificate for shares of the Company's Common
                    Stock.  Incorporated by reference to Exhibit 1.1 of the
                    Amendment No. 1 on Form 8 to Application or Report Filed
                    Pursuant to Section 12, 13 or 15(d) of the Securities
                    Exchange Act of 1934, dated October 4, 1988 (File No. 0-
                    17187)
        5.1*        Opinion Letter of Barack, Ferrazzano, Kirschbaum & Perlman
                    regarding the validity of the securities being registered
       10.1*        Assignment of Warrant to purchase an aggregate of 100,000
                    shares of Common Stock
       10.2*        Form of Warrant to purchase an aggregate of 31,850 shares
                    of Common Stock.  Incorporated by reference to Exhibit 4.2
                    of the Registrant's Quarterly Report on Form 10-Q for the
                    quarter ended September 30, 1995 (File No. 0-17187)
       10.3*        Form of Warrant to purchase an aggregate of 2,500 shares
                    of Common Stock.  Incorporated by reference to Exhibit 4.1
                    of the Registrant's Quarterly Report on Form 10-Q for the
                    quarter ended September 30, 1995 (File No. 0-17187)
       10.4*        Secured Promissory Note between Howard Farkas and the
                    Registrant
       10.5*        Secured Promissory Note between Albert Morrison, Jr. and
                    the Registrant
       10.6*        Real Estate Lease.  Incorporated by reference to Exhibit
                    10.1 of the Registrant's Quarterly Report on Form 10-Q for
                    the quarter ended September 30, 1996 (File No. 0-17187)
       23.1*        Consent of Barack, Ferrazzano, Kirschbaum & Perlman
                    (included in Exhibit 5.1)
       23.2*        Consent of Meredith Cardozo
       24.1*        Powers of Attorney (included on signature page)

 * Previously filed
<PAGE>

 ITEM 17.  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;

            (i)   To include any prospectus required by Section 10(a)(3) of
 the Securities Act;

            (ii)  To reflect in the prospectus any facts or events arising
 after the effective date of the Registration Statement (or the most recent
 post-effective amendment thereof) which, individually or in the aggregate,
 represent a fundamental change in the information set forth in the
 Registration Statement;

            (iii)      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;

 provided, however, that paragraphs (a)(l)(i) and (a)(l)(ii) do not apply if
 the information required to be included in a post-effective amendment by
 those paragraphs is contained in periodic reports filed by the Registrant
 pursuant to Section 13 or Section 15(d) of the Exchange Act that are
 incorporated by reference 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.

        (3)  To remove from registration by means of a post-effective
 amendment any of the securities being registered that remain unsold at the
 termination of the offering.

   (b)  The undersigned Registrant hereby undertakes that, for purposes of
 determining 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 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.

<PAGE>

                              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-3 and has caused this 
    
   Pre-effective
 amendment No.1 to the     registration statement    on Form S-3     to be 
 signed on its behalf by the undersigned, thereunto duly authorized, in the
 City of Sunnyvale, State of California, on    January 6, 1997    .[/R]

                                 LOGIC DEVICES INCORPORATED


                                 By:/S/ WILLIAM J. VOLZ
                                        William J. Volz
                                        President and Director

                                 By:/S/ TODD J. ASHFORD
                                        Todd J. Ashford
                                        Chief Financial Officer


     Pursuant to the requirements of the Securities Act of 1933, this 
    
   Pre-
 Effective Amendment No. 1 to the      Registration Statement on Form S-3 has
 been signed by each of following persons in the capacities indicated on 
    January 6, 1997    .[/R]

 SIGNATURE                       TITLE


    *                            Chairman of the Board
 Howard L. Farkas

    *                            Director
 Burton W. Kanter

    *                            Director
 Albert Morrison, Jr.

    *                            Director
 Bruce B. Lusignan

 /S/ WILLIAM J. VOLZ             President and Director
 William J. Volz                 (Principal Executive Officer)

 /S/ TODD J. ASHFORD             Chief Financial Officer (Principal
 Todd J. Ashford                 Financial and Accounting Officer)


    *  Todd J. Ashford, by signing his name hereto, does hereby sign this
 document on behalf of himself and on behalf of each of the other persons
 named above pursuant to powers of attorney duly executed by such other
 persons and included on the signature page of the original filing of the
 Registration Statement.    


                                 /S/  TODD J. ASHFORD
                                 TODD J. ASHFORD, Attorney-in-Fact
<PAGE>

                   LOGIC DEVICES INCORPORATED

                       INDEX TO EXHIBITS

 EXHIBIT
 NUMBER     DESCRIPTION OF EXHIBITS             SEQUENTIALLY
                                                NUMBERED
                                                PAGE OF
                                                EXHIBIT
 3.1*   Articles of Incorporation of Logic Devices Incorporated, as amended.
        Incorporated by reference to Ex. 3.1 of the Registrant's Form S-18
        Registration Statement (File No. 33-23763-LA)
 3.2*   Bylaws of Logic Devices Incorporated.  Incorporated by reference to
        Ex. 3.2 of the Registrant's Form S-18 Registration Statement (File No.
        33-23763-LA)
 4.1*   Form of certificate for shares of the Company's Common Stock.
        Incorporated by reference to Exhibit 1.1 of the Amendment No. 1 on
        Form 8 to Application or Report Filed Pursuant to Section 12, 13 or
        15(d) of the Securities Exchange Act of 1934, dated October 4, 1988
        (File No. 0-17187)
 5.1*   Opinion Letter of Barack, Ferrazzano, Kirschbaum & Perlman regarding
        the validity of the securities being registered
 10.1*  Assignment of Warrant to purchase an aggregate of 100,000 shares of
        Common Stock
 10.2*  Form of Warrant to purchase an aggregate of 31,850 shares of Common
        Stock.  Incorporated by reference to Exhibit 4.2 of the Registrant's
        Quarterly Report on Form 10-Q for the quarter ended September 30, 1995
        (File No. 0-17187)
 10.3*  Form of Warrant to purchase an aggregate of 2,500 shares of Common
        Stock.  Incorporated by reference to Exhibit 4.1 of the Registrant's
        Quarterly Report on Form 10-Q for the quarter ended September 30, 1995
        (File No. 0-17187)
 10.4*  Secured Promissory Note between Howard Farkas and the Registrant
 10.5*  Secured Promissory Note between Albert Morrison, Jr. and the
        Registrant
 10.6*  Real Estate Lease. Incorporated by reference to Exhibit 10.1 of the
        Registrant's Quarterly Report on Form 10-Q for the quarter ended
        September 30, 1996 (File No. 0-17187)
 23.1*  Consent of Barack, Ferrazzano, Kirschbaum & Perlman (included as part
        of Exhibit 5)
 23.2*  Consent of Meredith Cardozo
 24.1*  Powers of Attorney (included on signature page)

 *  Previously filed


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