Exhibit 99.3

                            QUICKTURN DESIGN SYSTEMS, INC.

                          KEY EXECUTIVE STOCK OPTION PLAN

                       (As amended through October 15, 1993)

     1.   PURPOSES OF THE PLAN.  The purposes of this Stock Option Plan are (1)
to retain and reward the Company's key executives whose performance is necessary
to produce results which contribute to the long term growth and development of
the Company, and (2) to incentivize the Company's achievement of its revenue and
operating targets.

     Options granted hereunder may be either Incentive Stock Options (as defined
in Section 422 of the Code) or Nonstatutory Stock Options, as determined by the
Administrator at the time of grant of an option and subject to the applicable
provisions of Section 422 of the Code, as amended, and the regulations
promulgated thereunder.

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

          (a)  "ADMINISTRATOR" shall mean the Board or any of its committees
appointed pursuant to Section 4 of the Plan.

          (b)  "BOARD" shall mean the Board of Directors of the Company.

          (c)  "CODE" shall mean the Internal Revenue Code of 1986, as amended.

          (d)  "COMMITTEE" shall mean a committee appointed by the Board of
Directors in accordance with paragraph (a) of Section 4 of the Plan.

          (e)  "COMMON STOCK" shall mean the Common Stock, $.001 par value per
share, of the Company.

          (f)  "COMPANY" shall mean Quickturn Design Systems, Inc., a Delaware
corporation.

          (g)  "CONTINUOUS STATUS AS A KEY EXECUTIVE" shall mean the absence of
any interruption or termination of the employment relationship by the Company or
any Subsidiary.  Continuous Status as a Key Executive shall not be considered
interrupted in the case of sick leave, military leave, or any other leave of
absence approved by the Board; provided that such leave is for a period of not
more than 90 days or reemployment upon the expiration of such leave is
guaranteed by contract or statute, or unless provided otherwise pursuant to
Company policy.

          (h)  "KEY EXECUTIVE" shall mean an executive officer employed by the
Company or any Parent or Subsidiary of the Company.

          (i)  "FAIR MARKET VALUE" means, as of any date, the value of Common
Stock determined as follows:

               (i)    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, its Fair Market Value shall be the closing sales
price for such stock (or the closing bid, if no sales were reported, as quoted
on such system or exchange for the last market trading day prior to the time of
determination) as reported in the Wall Street Journal or such other source as
the Administrator deems reliable;




               (ii)   If the Common Stock is quoted on the NASDAQ System (but
not on the National Market System thereof) or regularly quoted by a recognized
securities dealer but selling prices are not reported, its Fair Market Value
shall be the mean between the high and low asked prices for the Common Stock or;

               (iii)  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.

          (j)  "INCENTIVE STOCK OPTION" shall mean an Option intended to qualify
as an incentive stock option within the meaning of Section 422 of the Code.

          (k)  "NONSTATUTORY STOCK OPTION" shall mean an Option not intended to
qualify as an Incentive Stock Option.

          (1)  "OPTION" shall mean a stock option granted pursuant to the Plan.

          (m)  "OPTIONED STOCK" shall mean the Common Stock subject to an
Option.

          (n)  "OPTIONEE" shall mean a Key Executive who receives an Option.

          (o)  "PARENT" shall mean a "parent corporation", whether now or
hereafter existing, as defined in Section 424(e) of the Code.

          (p)  "PLAN" shall mean this Key Executive Stock Option Plan.

          (q)  "SHARE" shall mean a share of the Common Stock, as adjusted in
accordance with Section 11 or the Plan.

          (r)  "SUBSIDIARY" shall mean 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 11 of
the Plan, the maximum aggregate number of shares which may be optioned and sold
under the Plan is four hundred fifty thousand (450,000) shares of Common Stock.
The Shares may be authorized, but unissued, or reacquired Common Stock.

     If an Option should expire or become unexercisable for any reason without
having been exercised in full, the unpurchased Shares which were subject thereto
shall, unless the Plan shall have been terminated, become available for future
grant under the Plan.

     4.   ADMINISTRATION OF THE PLAN.

          (a)  Procedure.

               (i)    The Plan shall be administered by (A) the Board if the
Board may administer the Plan in compliance with Rule 16b-3 promulgated under
the Securities Exchange Act of 1934, as amended (the "Exchange Act") or any
successor thereto ("Rule 16b-3") with respect to a plan intended to qualify
thereunder as a discretionary plan, or (B) a committee designated by the Board
to administer the Plan, which committee shall be constituted in such a manner as
to permit the Plan to comply with Rule 16b-3 with respect to a plan intended to
qualify thereunder as a discretionary plan.  Once appointed, such committee
shall continue to serve in its designated capacity until otherwise directed by
the Board.  From time to time the Board, may increase the size of the committee
and appoint additional members thereof, remove members (with or without cause)
and appoint new members in substitution therefor, fill vacancies, however
caused, and remove all members of the committee and thereafter directly
administer the Plan, all to the extent permitted by Rule 16b-3 with respect to a
plan intended to qualify thereunder as a discretionary plan.


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          (b)  POWERS OF THE ADMINISTRATOR.  Subject to the provisions of the
Plan and in the case of a Committee, 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(i) of the Plan;

               (ii)   to select the Key Executives to whom Options may from time
to time 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 such Option granted hereunder;

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

               (vi)   to determine the terms and conditions, not inconsistent
with the terms of the Plan, of any award granted-hereunder;

               (vii)  to determine the terms of vesting or to accelerate the
vesting of any Option granted under the Plan;

               (viii) 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.

          (c)  EFFECT OF ADMINISTRATOR'S DECISION.  All decisions,
determinations and interpretations of the Administrator shall be final and
binding on all Optionees and any other holders of any Options.

     5.   ELIGIBILITY.

          (a)  A Key Executive may be granted either Nonstatutory Stock Options
or Incentive Stock Options.  A Key Executive who has been granted an Option may,
if he is otherwise eligible, be granted an additional Option or Options.

          (b)  Each Option shall be designated in the written option agreement
as either an Incentive Stock Option or a Nonstatutory Stock Option.  However,
notwithstanding such designations, to the extent that the aggregate Fair Market
Value of the Shares with respect to which Options designated as Incentive Stock
Options are exercisable for the first time by any Optionee 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.

          (c)  For purposes of Section 5(b), 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 the Option with respect
to such shares is granted.

          (d)  The Plan shall not confer upon any Optionee any right with
respect to continuation of employment with the Company, nor shall it interfere
in any way with his right or the Company's right to terminate his employment at
any time, with or without cause.

     6.   TERM OF PLAN.  The Plan shall become effective upon the earlier to
occur of its adoption by the Board of Directors or its approval by the
stockholders of the Company as described in Section 17 of the Plan.  It shall
continue in effect for a term of ten (10) years unless sooner terminated under
Section 13 of the Plan.


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     7.   TERM OF OPTION.  The term of each Option shall be ten (10) years from
the date of grant thereof or such shorter term as may be provided in the Option
Agreement.  However, in the case of an Option granted to an Optionee who, at the
time the 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 Option shall be five (5) years from the date of
grant thereof or such shorter term as may be provided in the Option Agreement.

     8.   EXERCISE PRICE AND CONSIDERATION.

          (a)  The per Share exercise price for the Shares to be issued pursuant
to exercise of an Option shall be such price as is determined by the Board, but
shall be subject to the following:

               (i)    In the case of an Incentive Stock Option

                      (A) granted to a Key Executive who, at the time of the
grant of such Incentive Stock Option, 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 Key Executive, 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

                      (A) granted to a Key Executive who, at the time of the
grant of such Option, 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 the grant.

                      (B) granted to any Key Executive, the per Share exercise
price shall be no less than 85% of the Fair Market Value per Share on the date
of grant.

          (b)  The consideration to be paid for the Shares to be issued upon
exercise of an Option, including the method of payment, shall be determined by
the Administrator and may consist entirely of (1) cash, (2) check, (3)
promissory note, (4) other Shares of Common Stock which (x) have been owned by
the Optionee for more than six (6) months on the date of surrender and (y) 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, (5)
authorization from the Company to retain from the total number of shares as to
which the Option is exercised that number of Shares having a Fair Market Value
on the date of exercise equal to the exercise price for the total number of
Shares as to which the Option is exercised, (6) delivery of a properly executed
exercise notice together with such 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 (7) any combination of such methods of payment, or (8) such
other consideration and method of payment for the issuance of Shares to the
extent permitted under applicable laws.  In making its determination as to the
type of consideration to accept, the Administrator shall consider if acceptance
of such consideration may be reasonably expected to benefit the Company.

     9.   EXERCISE OF OPTION.

          (a)  PROCEDURE FOR EXERCISE: RIGHTS AS A STOCKHOLDERS.  Any Option
granted hereunder shall be exercisable at such times and under such conditions
as determined by the Board, including performance criteria with respect to the
Company and/or the Optionee, and as shall be permissible under the terms of the
Plan.

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


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          An Option shall be deemed to be exercised when written notice of such
exercise has been given to the Company in accordance with the terms of the
Option by the person entitled to exercise the Option and full payment for the
Shares with respect to which the Option is exercised has been received by the
Company.  Full payment may, as authorized by the Board, consist of any
consideration and method of payment allowable under Section 8(b) of the Plan.
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 stockholder 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 upon exercise of the Option.

          Exercise of an Option in any manner shall result in a decrease in the
number of Shares which thereafter may be 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 STATUS AS A KEY EXECUTIVE.  In the event of
termination of an Optionee's Continuous Status as a Key Executive, such Optionee
may, but only within thirty (30) days (or such other period of time, not
exceeding three (3) months in the case of an Incentive Stock Option as is
determined by the Board, with such determination in the case of an Incentive
Stock Option being made at the time of grant of the Option) after the date of
such termination (but in no event later than the date of expiration of the term
of such Option as set forth in the Option Agreement), exercise his Option to the
extent that he was entitled to exercise it at the date of such termination.  To
the extent that he was not entitled to exercise the Option at the date of such
termination, or if he does not exercise such Option (which he was entitled to
exercise) within the time specified herein, the Option shall terminate.

          (c)  DISABILITY OF OPTIONEE.  Notwithstanding the provisions of
Section 9(b) above, in the event of termination of an Optionee's Continuous
Status as a Key Executive as a result of his total and permanent disability (as
defined in Section 22(e)(3) of the Code), he may, but only within six (6) months
(or such other period of time not exceeding twelve (12) months as is determined
by the Board, with such determination in the case of an Incentive Stock Option
being made at the time of grant of the Option) from the date of such termination
(but in no event later than the date of expiration of the term of such Option as
set forth in the Option Agreement), exercise his Option to the extent he was
entitled to exercise it at the date of such termination.  To the extent that he
was not entitled to exercise the Option at the date of termination, or if he
does not exercise such Option (which he was entitled to exercise) within the
time specified herein, the Option shall terminate.

          (d)  DEATH OF OPTIONEE.  In the event of the death of an Optionee
during the term of the Option who is at the time of his death a Key Executive of
the Company and who shall have been in continuous Status as an Key Executive
since the date of grant of the Option, the Option may be exercised, at any time
within six (6) months following the date of death (but in no event later than
the date of expiration of the term of such Option as set forth in the Option
Agreement), by the Optionee's estate or by a person who acquired the right to
exercise the Option by bequest or inheritance, but only to the extent of the
right to exercise that would have accrued as of the date of death; provided,
however, that in the event of the death of the Optionee during the first twelve
(12) months of employment, Option shall be vested through the date of death at
the rate of 1/48 of the Shares per month.

          (e)  RULE 16b-3.  Options granted to persons subject to Section 16(b)
of the Exchange Act must comply with Rule 16b-3 and shall contain such
additional conditions or restrictions as may be required thereunder to qualify
for the maximum exemption from Section 16 of the Exchange Act with respect to
Plan transactions.

     10.  NON-TRANSFERABILITY OF OPTIONS.  The 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.


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     11.  ADJUSTMENTS UPON CHANGES IN CAPITALIZATION OR MERGER.

          (a)  CHANGES IN CAPITALIZATION.  Subject to any required action by the
stockholders 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, the Board shall notify the Optionee
at least fifteen (15) days prior to such proposed action.  To the extent it has
not been previously exercised, the Option will terminate immediately prior to
the consummation of such proposed action.

          (c)  MERGER.  In the event of a merger of the Company with or into
another corporation, unless the Option is assumed or an equivalent option
substituted by the successor corporation or a parent or subsidiary of such
successor corporation, the Option shall terminate as of the date of the closing
of the merger.

     12.  TIME OF GRANTING OPTIONS.  The date of grant of an Option shall, for
all purposes, be the date on which the Administrator makes the determination
granting such Option or such other date as is determined by the Administrator.
Notice of the determination shall be given to each Key Executive to whom an
Option is so granted within a reasonable time after the date of such grant.

     13.  AMENDMENT AND TERMINATION OF THE PLAN.

          (a)  AMENDMENT AND TERMINATION.  The Board may at any time amend,
alter, suspend or discontinue the Plan, but no amendment, alteration, suspension
or discontinuation shall be made which would impair the rights of any Optionee
under any grant theretofore made, without his or her consent.  In addition, to
the extent necessary and desirable to comply with Rule 16b-3 under the Exchange
Act or with Section 422A of the Code (or any other applicable law or regulation,
including the requirements of the NASD or an established stock exchange), the
Company shall obtain stockholder approval of any Plan amendment in such a manner
and to such a degree as required.

          (b)  EFFECT OF AMENDMENT OR TERMINATION.  Any such amendment or
termination of the Plan shall not affect Options already granted and such
Options shall remain in full force and effect as if this Plan had not been
amended or terminated, unless mutually agreed otherwise between the Optionee and
the Board, which agreement must be in writing and signed by the Optionee and the
Company.

     14.  CONDITIONS UPON ISSUANCE OF SHARES.  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 pursuant thereto 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, and the requirements of any stock exchange upon which the Shares may
then be listed, and shall be further subject to the compliance.

     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


                                          6


without any present intention to sell or distribute such Shares if, in the
opinion of counsel for the company, such a representation is required by any of
the aforementioned relevant provisions of law.

     15.  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.

     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.

     16.  OPTION AGREEMENT.  Options shall be evidenced by written option
agreements in such form as the Board shall approve.

     17.  STOCKHOLDER APPROVAL.

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

     18.  INFORMATION TO OPTIONEES.  The Company shall provide to each Optionee,
during the period for which such Optionee has one or more Options outstanding,
and to each individual who acquired shares pursuant to the exercise of an
option, copies of all annual reports and other information which are provided to
all stockholders of the Company.  The Company shall not be required to provide
such information if the issuance of Options under the Plan is limited to Key
Executives whose duties in connection with the Company assure their access to
equivalent information.


                                          7


                               QUICKTURN SYSTEMS, INC.

                          INCENTIVE STOCK OPTION AGREEMENT

     Quickturn Systems, Inc., a California corporation (the "Company"), has
granted to _________ (the "Optionee"), an option (the "Option") to purchase a
total of _______ shares of Common Stock (the "Shares"), at the price determined
as provided herein, and in all respects subject to the terms, definitions and
provisions of the Key Executive Stock Option Plan (the "Plan") adopted by the
Company, which is incorporated herein by reference.  Unless otherwise defined
herein, the terms defined in the Plan shall have the same defined meanings
herein.

     1.   NATURE OF THE OPTION.  This Option is intended to qualify as an
Incentive Stock Option as defined in Section 422 of the Code.

     2.   EXERCISE PRICE.  The exercise price is ______ for each share of Common
Stock, which price is not less than the fair market value per share of the
Common Stock on the date of grant.

     3.   EXERCISE OF OPTION.  This Option shall be exercisable during its term
in accordance with the provisions of Section 9 of the Plan as follows:

          (i)   RIGHT TO EXERCISE.

                (a)  Subject to subsections 3(i)(b), (c), (d) and (e) below,
this Option shall be exercisable cumulatively, to the extent of 1/6 of the
Shares subject to the Option on the date 12 months after ______________ (the
"Vesting Commencement Date") and 1/72 of the Shares subject to the Option for
each one-month period thereafter; provided, however, that such vesting schedule
shall be adjusted to provide that this Option shall be exercisable cumulatively,
to the extent of 1/4 of the Shares subject to the Option on the date 12 months
after the Vesting Commencement Date and 1/48 of the Shares subject to the Option
for each one-month period thereafter in the event any one of the following
occurs:  (i) achievement by the Company of its projected revenue and operating
profit goals set forth in the 1993 Operating Plan approved by the Board of
Directors or in any Operating Plan for a subsequent fiscal year which has been
approved by the Board of Directors, (ii) a Change of Control (as defined in
subsection (e) below) or (iii) involuntary termination of Optionee's employment
without Cause (as defined in subsection (e) below).  This Option may be
exercised in whole or in part at any time, as to Shares which have not yet
vested under the above vesting schedule; provided, however, that the Optionee
shall execute, as a condition to such exercise of this Option, the Restricted
Stock Purchase Agreement attached hereto as Exhibit A.

                (b)  This Option may not be exercised for a fraction of a share.

                (c)  In the event of Optionee's death, disability or other
termination of employment, the exercisability of the Option is governed by
Sections 7, 8 and 9 below, subject to the limitations contained in subsection
3(i) (d)

                (d)  In no event may this Option be exercised after the date of
expiration of the term of this Option as set forth in Section 11 below.

                (e)  If, within 12 months after a Change of Control, Optionee's
employment is involuntarily terminated other than for Cause or Constructively
Terminated, then Optionee's stock options shall be accelerated with respect to
that number of Shares which would have vested after 24 months of additional
employment.  For purposes of the foregoing, termination "for Cause" shall mean
(i) the willful failure by Optionee substantially to perform Optionee's material
duties after a written demand for substantial performance is delivered to
Optionee by the Board of Directors which specifically identifies the manner in
which the Board of Directors believes that Optionee has not substantially
performed Optionee's duties, (ii) the failure (in a material respect) by
Optionee to follow reasonable policies or directives established by the Board of
Directors of the Company after written notice to Optionee by the Board of
Directors that Optionee is not following such policies or directives, (iii) bad
faith conduct




that is materially detrimental to the Company, or (iv) the conviction of
Optionee of any crime involving the property or business of the Company or its
affiliates.  For purposes of the foregoing, a "Change of Control" shall be
deemed to have occurred if (i) the Company sells or otherwise disposes of all or
substantially all of its assets; (ii) there is a merger or consolidation of the
Company with any other entity, provided that the shareholders of the Company, as
a group, do not hold, immediately after such event, at least 50% of the voting
power of the surviving or successor entity; (iii) any person or entity,
including any "person" as such term is used in Section 13(d) (3) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), becomes the
"beneficial owner" (as defined in the Exchange Act) of Common Stock of the
Company representing 50% or more of the combined voting power of the voting
securities of the Company (exclusive of persons who are no officers or directors
of the Company) .  For purposes of the foregoing, Optionee's employment with the
Company shall be deemed to have been "Constructively Terminated" in the event of
a material decrease in Optionee's responsibility or authority.

          (ii)  METHOD OF EXERCISE.  This Option shall be exercisable by written
notice which shall state the election to exercise the Option, the number of
Shares in respect of which the Option is being exercised, and such other
representations and agreements as to the holder's investment intent with respect
to such shares of Common Stock as may be required by the Company pursuant to the
provisions of the Plan.  Such written notice shall be signed by the Optionee and
shall be delivered in person or by certified mail to the Secretary of the
Company.  The written notice shall be accompanied by payment of the Exercise
Price.  This Option shall be deemed to be exercised upon receipt by the Company
of such written notice accompanied by the Exercise Price

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

     4.   OPTIONEE'S REPRESENTATIONS.  In the event the Shares purchasable
pursuant to the exercise of this Option have not been registered under the
Securities Act of 1933, as amended, at the time this Option is exercised,
Optionee shall, concurrently with the exercise of all or any portion of this
Option, deliver to the Company his Investment Representation Statement in the
form attached hereto as Exhibit B, and shall read the applicable rules of the
Commissioner of Corporations attached to such Investment Representation
Statement.

     5.   METHOD OF PAYMENT.  Payment of the exercise price shall be by any of
the following, or a combination thereof, at the election of the Optionee:

          (i)   cash;

          (ii)  check;

          (iii) surrender of other shares of Common Stock of the Company which
(A) in the case of Shares acquired pursuant to the exercise of a Company option,
have been owned by the Optionee for more than six (6) months on the date of
surrender, and (B) have a Fair Market Value on the date of surrender equal to
the Exercise Price of the Shares as to which the Option is being exercised; or

          (iv)  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.

     6.   RESTRICTIONS ON EXERCISE.  This Option may not be exercised until such
time as the Plan has been approved by the shareholders of the Company, or if the
issuance of such Shares upon such exercise or the method of payment of
consideration for such shares would constitute a violation of any applicable
federal or state securities or other law or regulation, including any rule under
Part 207 of Title 12 of the Code of Federal Regulations ("Regulation G") as
promulgated by the Federal Reserve Board.  As a condition to the exercise of
this Option, the Company may require Optionee to make any representation and
warranty to the Company as may be required by any applicable law or regulation.


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     7.   TERMINATION OF STATUS AS AN EMPLOYEE.  In the event of termination of
Optionee's Continuous Status as an Employee or Consultant, he may, but only
within ninety (90) days after the date of such termination (but in no event
later than the date of expiration of the term of this Option as set forth in
Section 11 below), exercise this Option to the extent that he was entitled to
exercise it at the date of such termination.  To the extent that he was not
entitled to exercise this Option at the date of such termination, or if he does
not exercise this Option within the time specified herein, the Option shall
terminate.

     8.   DISABILITY OF OPTIONEE.  Notwithstanding the provisions of Section 7
above, in the event of termination of Optionee's Continuous Status as an
Employee or Consultant as a result of his total and permanent disability (as
defined in Section 22(e)(3) of the Code), he may, but only within six months
from the date of termination of employment (but in no event later than the date
of expiration of the term of this Option as set forth in Section 11 below),
exercise his Option to the extent he was entitled to exercise it at the date of
such termination.  To the extent that he was not entitled to exercise the Option
at the date of termination, or if he does not exercise such Option (which he was
entitled to exercise) within the time specified herein, the Option shall
terminate.

     9.   DEATH OF OPTIONEE.  In the event of the death of Optionee the Option
may be exercised, at any time within six (6) months following the date of death
(but in no event later than the date of expiration of the term of this Option as
set forth in Section 11 below), by Optionee's estate or by a person who acquired
the right to exercise the Option by bequest or inheritance, but only to the
extent of the right to exercise that had accrued at the date of death; provided,
however, in the event of the death of Optionee during the first twelve (12)
months after the Vesting Commencement Date, this Option shall be vested through
the date of death at the rate of 1/48th of the Shares for each month elapsed
after the Vesting Commencement Date.

     10.  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 him.  The terms of this
Option shall be binding upon the executors, administrators, heirs, successors
and assigns of the Optionee.

     11.  TERM OF OPTION.  This Option may not be exercised more than ten (10)
years (five years if Optionee owns, immediately before this Option is granted,
stock representing more than 10 percent of the total combined voting power of
all classes of stock of the Company or of any Parent or Subsidiary) from the
date of grant of this Option, and may be exercised during such term only in
accordance with the Plan and the terms of this Option.

     12.  TAX CONSEQUENCES.  Set forth below is a brief summary as of the date
of this Option of some of the federal and California tax consequences of
exercise of this Option and disposition of the Shares.  THIS SUMMARY IS
NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE.
OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR DISPOSING
OF THE SHARES.

               (i)   EXERCISE OF ISO.  If this Option qualifies as an ISO, there
will be no regular federal income tax liability or California income tax
liability upon the exercise of the Option, although the excess, if any, of the
Fair Market Value of the Shares on the date of exercise over the Exercise Price
will be treated as an adjustment to the alternative minimum tax for federal tax
purposes and may subject the Optionee to the alternative minimum tax in the year
of exercise.

               (ii)  EXERCISE OF NONSTATUTORY STOCK OPTIONS.   If this Option
does not qualify as an ISO, there may be a regular federal income tax liability
and a California income tax liability upon the exercise of the Option.  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 Shares on the date of exercise over the Exercise Price.  If Optionee is
an employee, the Company will be required to withhold from Optionee's
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.


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               (iii) DISPOSITION OF SHARES.  In the case of an NSO, if Shares
are held for at least one year, any gain realized on disposition of the Shares
will be treated as long-term capital gain for federal and California income tax
purposes.  In the case of an ISO, if Shares transferred pursuant to the Option
are held for at least one year after exercise and are disposed of at least two
years after the Date of Grant, any gain realized on disposition of the Shares
will also be treated as long-term capital gain for federal and California income
tax purposes.  If Shares purchased under an ISO are disposed of within such
one-year period or within two years after the Date of Grant, 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 Fair Market Value of
the Shares on the date of exercise over the Exercise Price.

               (iv)  NOTICE OF DISQUALIFYING DISPOSITION OF ISO SHARES.  If the
Option granted to Optionee herein is an ISO, and if Optionee sells or otherwise
disposes of any of the Shares acquired pursuant to the ISO on or before the
later of (1) the date two years after the Date of Grant, or (2) the date one
year after the date of exercise, the Optionee shall immediately notify the
Company in writing of such disposition.  Optionee agrees that Optionee may be
subject to income tax withholding by the Company on the compensation income
recognized by the Optionee from the early disposition by payment in cash or out
of the current earnings paid to the Optionee.

DATE OF GRANT:
                                        QUICKTURN SYSTEMS, INC.,
                                        a California corporation

                                        By:
                                           -------------------------------------

                                        Title:
                                              ----------------------------------


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     OPTIONEE ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES PURSUANT TO
SECTION 3 HEREOF IS EARNED ONLY BY CONTINUING EMPLOYMENT AT THE WILL OF THE
COMPANY (NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED THIS OPTION OR
ACQUIRING SHARES HEREUNDER).  OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT
NOTHING IN THIS AGREEMENT, NOR IN THE COMPANY'S STOCK OPTION PLAN WHICH IS
INCORPORATED HEREIN BY REFERENCE, SHALL CONFER UPON OPTIONEE ANY RIGHT WITH
RESPECT TO CONTINUATION OF EMPLOYMENT BY THE COMPANY, NOR SHALL IT INTERFERE IN
ANY WAY WITH HIS RIGHT OR THE COMPANY'S RIGHT TO TERMINATE HIS EMPLOYMENT AT ANY
TIME, WITH OR WITHOUT CAUSE.

     Optionee acknowledges receipt of a copy of the Plan and certain information
related thereto and represents that he is familiar with the terms and provisions
thereof, and hereby accepts this Option subject to all of the terms and
provisions thereof.  Optionee has reviewed the Plan and this Option in their
entirety, has had an opportunity to obtain the advice of counsel prior to
executing this Option and fully understands all provisions of the Option.
Optionee hereby agrees to accept as binding, conclusive and final all decisions
or interpretations of the Board upon any questions arising under the Plan.
Optionee further agrees to notify the Company upon any change in the residence
address indicated below.

Dated:
       ----------------------
                                        -----------------------------
                                        Optionee

                                        Residence Address:

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

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




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