<PAGE>
EXHIBIT 11
TranSwitch Corporation
Computation of Earnings per Share (1)
(Unaudited)
(in thousands, except per share data)
<TABLE>
<CAPTION>
Three Months Ended Six Months Ended
June 30, June 30,
2000 1999 2000 1999
---- ---- ---- ----
<S> <C> <C> <C> <C>
Basic earnings per share:
Net income 7,949 4,566 14,427 7,801
====== ====== ====== ======
Weighted average number of common shares
outstanding during the period 40,559 38,495 40,313 37,452
Basic earnings per share 0.20 0.12 0.36 0.21
====== ====== ====== ======
Diluted earnings per share:
Net income 7,949 4,566 14,427 7,801
====== ====== ====== ======
Weighted average number of common shares
outstanding during the period 40,559 38,495 40,313 37,452
Common stock issuable with respect to:
Stock options and warrants 3,171 3,139 3,164 3,195
------ ------ ------ ------
Adjusted weighted average number of shares 43,730 41,634 43,477 40,647
outstanding during the period
Diluted earnings per share 0.18 0.11 0.33 0.19
====== ====== ====== ======
</TABLE>
----------
(1) This exhibit should be read in connection with "Consolidated Statement of
Stockholders' Equity" in Note 5 of the notes to the Consolidated Financial
Statements.