Exhibit 3.1

                             AMENDED AND RESTATED
                         CERTIFICATE OF INCORPORATION
                                      OF
                             MICROSEMI CORPORATION

     Microsemi Corporation, a corporation organized and existing under the laws
of the State of Delaware (the "Corporation"), hereby certifies as follows:

     1.   The name of the Corporation is Microsemi Corporation.  The date of
filing of its original Certificate of Incorporation with the Secretary of State
of the State of Delaware was September 27, 1960. The Corporation was originally
incorporated under the name Microsemiconductor Corporation.

     2.   This Amended and Restated Certificate of Incorporation restates and
integrates and further amends the Certificate of Incorporation of this
Corporation including, without limitation, an amendment increasing the number of
authorized shares of Common Stock of this Corporation from 20,000,000 to
100,000,000.

     3.   The text of the Certificate of Incorporation as amended or
supplemented heretofore is further amended hereby to read as herein set forth in
full:

          FIRST:    The name of the Corporation is MICROSEMI CORPORATION.

          SECOND:  The location of the registered office of the Corporation in
     the State of Delaware is at 2711 Centerville Road, Suite 400, City of
     Wilmington, County of New Castle.  The name and address of its registered
     agent in charge thereof upon whom process against the Corporation may be
     served is United States Corporation Company, 2711 Centerville Road, Suite
     400, Wilmington, County of New Castle, Delaware 19808.

          THIRD:  The Purpose of the Corporation is to engage in any lawful act
     or activity for which corporations may be organized under the General
     Corporation Law of the State of Delaware.

          FOURTH:  The total number of shares of stock which the Corporation
     shall have the authority to issue is one hundred one million (101,000,000)
     shares, consisting of a class of one million (1,000,000) shares of
     Preferred Stock of the par value of $1.00 per share, and a class of one
     hundred million (100,000,000) shares of Common Stock of the par value of
     $0.20 per share (the Preferred Stock, par value $1.00 per share, being
     herein referred to as "Preferred Stock"; and the Common Stock, par value
     $0.20 per share, being herein referred to as "Common Stock"). The Board of
     Directors is expressly authorized to provide for the issuance of the shares
     of Preferred Stock in one or more series and, by filing a Certificate
     pursuant to the applicable law of the State of Delaware, to establish, from
     time to time the number of shares to be included in each series, and to fix
     the designations, powers, preferences and relative, participating, optional
     or other special rights, if any, of the shares of each such series and the
     qualifications, limitations and restrictions thereof, if any, with respect
     to each such series of Preferred Stock.

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          FIFTH:      The Board of Directors of the Corporation shall have the
     power to make, alter, and repeal the bylaws of the Corporation subject to
     the reserved power of the stockholders to make, alter, and repeal bylaws.

          SIXTH:

          Section 1.  Elimination of Certain Liability of Directors. A director
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     of the Corporation shall not be personally liable to the Corporation or its
     stockholders for monetary damages for breach of fiduciary duty as a
     director, except for liability (i) for any breach of the director's duty of
     loyalty to the Corporation or its stockholders, (ii) for acts or omissions
     not in good faith or which involve intentional misconduct or a knowing
     violation of law, (iii) under Section 174 of the Delaware General
     Corporation Law, or (iv) for any transaction from which the director
     derived an improper personal benefit.  The limitation of liability provided
     herein shall continue after a director has ceased to occupy such position
     as to acts or omissions occurring during such director's term or terms of
     office.

          Section 2.

               (a)    Right to Indemnification.  Each person who was or is made
                      -------------------------
          a party or is threatened to be made a party to or is involved in any
          action, suit or proceeding, whether civil, criminal, administrative or
          investigative (hereinafter a "proceeding"), by reason of the fact that
          he or she, or a person of whom he or she is the legal representative,
          is or was a director or officer, of the Corporation or is or was
          serving at the request of the Corporation as a director, officer,
          employee or agent of another corporation or of a partnership, joint
          venture, trust or other enterprise, including service with respect to
          employee benefit plans, whether the basis of such proceeding is
          alleged action in an official capacity as a director, officer,
          employee or agent or in any other capacity while serving as a
          director, officer, employee or agent, shall be indemnified and held
          harmless by the Corporation to the fullest extent authorized by the
          Delaware General Corporation Law, as the same exists or may hereafter
          be amended (but, in the case of any such amendment, only to the extent
          that such amendment permits the Corporation to provide broader
          indemnification rights than said law permitted the Corporation to
          provide prior to such amendment), against all expense, liability and
          loss (including attorney's fees, judgments, fines, ERISA excise taxes
          or penalties and amounts paid or to be paid in settlement) reasonably
          incurred or suffered by such person in connection therewith and such
          indemnification shall continue as to a person who has ceased to be a
          director, officer, employee or agent and shall inure to the benefit of
          his or her heirs, executors and administrators: provided, however,
          that, except as provided in paragraph (b) hereof, the Corporation
          shall indemnify any such person seeking indemnification in connection
          with a proceeding (or part thereof) initiated by such person only if
          such proceeding (or part thereof) was authorized by the board of
          directors of the Corporation. The right to indemnification conferred
          in this Section shall be a contract right and shall include the right
          to be paid by the Corporation the expenses incurred in defending any
          such proceeding in advance of its final disposition: provided,
          however, that, if the Delaware General Corporation Law requires, the
          payment of such expenses incurred

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          by a director or officer in his or her capacity as a director or
          officer (and not in any other capacity in which service was or is
          rendered by such person while a director or officer, including without
          limitation, service to an employee benefit plan) in advance of the
          final disposition of a proceeding, shall be made only upon delivery to
          the Corporation of an undertaking, by or on behalf of such director or
          officer, to repay all amounts so advanced if it shall ultimately be
          determined that such director or officer is not entitled to be
          indemnified under this Section or otherwise. The Corporation may, by
          action of its Board of Directors, provide indemnification to employees
          and agents of the Corporation with the same scope and effect as the
          foregoing indemnification of directors and officers.

               (b)  Right of Claimant to Bring Suit.  If a claim under paragraph
                    --------------------------------
          (a) of this Section is not paid in full by the Corporation within
          thirty days after a written claim has been received by the
          Corporation, the claimant may at any time thereafter bring suit
          against the Corporation to recover the unpaid amount of the claim and,
          if successful in whole or in part, the claimant shall be entitled to
          be paid also the expense of prosecuting such claim. It shall be a
          defense to any such action (other than an action brought to enforce a
          claim for expenses incurred in defending any proceeding in advance of
          its final disposition where the required undertaking, if any is
          required, has been tendered to the Corporation) that the claimant has
          not met the standards of conduct which makes it permissible under the
          Delaware General Corporation Law for the Corporation to indemnify the
          claimant for the amount claimed, but the burden of proving such
          defense shall be on the Corporation. Neither the failure of the
          Corporation (including its Board of Directors, independent legal
          counsel, or its stockholders) to have made a determination prior to
          the commencement of such action that indemnification of the claimant
          is proper in the circumstances because he or she has met the
          applicable standard of conduct set forth in the Delaware General
          Corporation Law, nor an actual determination by the Corporation
          (including its Board of Directors, independent legal counsel, or its
          stockholders) that the claimant has not met such applicable standard
          of conduct, shall be a defense to the action or create a presumption
          that the claimant has not met the applicable standard of conduct.

               (c)  Non-Exclusivity of Rights.  The right to the indemnification
                    --------------------------
          and the payment of expenses incurred in defending a proceeding in
          advance of its final disposition conferred in this Section shall not
          be exclusive of any other right which any person may have or hereafter
          acquire under any statute, provision of the Certificate of
          Incorporation, bylaw, agreement, vote of stockholders or disinterested
          directors or otherwise.

               (d)  Insurance.  The Corporation may maintain insurance, at its
                    ----------
          expense, to protect itself and any director, officer, employee or
          agent of the Corporation or another corporation, partnership, joint
          venture, trust or other enterprise against any such expense, liability
          or loss, whether or not the Corporation would have the power to
          indemnify such person against such expense, liability or loss under
          the Delaware General Corporation Law.

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          SEVENTH:   Whenever a compromise or arrangement is proposed between
     this Corporation and its creditors or any class of them and/or between this
     Corporation and its stockholders or any class of them, any court of
     equitable jurisdiction within the State of Delaware may, on the application
     in a summary way of this Corporation or of any creditor or stockholder
     thereof, or on the application of any receiver or receivers appointed for
     this Corporation under the provisions of Section 291 of Title 8 of the
     Delaware Code or the application of trustees in dissolution or of any
     receiver or receivers appointed for this Corporation under the provisions
     of Section 279 of Title 8 of the Delaware Code order a meeting of the
     creditors or class of creditors, and/or of the stockholders or class of
     stockholders of this Corporation, as the case may be, to be summoned in
     such manner as the said court directs. If a majority in number representing
     three-fourths in value of the creditors or class of creditors, and/or the
     stockholders or class of stockholders of this Corporation, as the case may
     be, agree to any compromise or arrangement and to any reorganization of
     this Corporation as consequence of such compromise or arrangement, the said
     compromise or arrangement and the said reorganization shall, if sanctioned
     by the court to which the said application has been made, be binding on all
     the creditors or class of creditors, and/or on all the stockholders or
     class of stockholders of this Corporation, as the case may be, and also on
     this Corporation.

          EIGHTH:    Any and all right, title, interest, and claim in or to any
     dividends declared by the Corporation, whether in cash, stock or otherwise,
     which are unclaimed by the stockholder entitled thereto for a period of six
     years after the close of business on the payment date, shall be and be
     deemed to be extinguished and abandoned; and such unclaimed dividends in
     the possession of the Corporation, its transfer agents or other agents or
     depositaries, shall at such time become the absolute property of the
     Corporation, free and clear of any and all claims of any persons
     whatsoever.

          NINTH:     There shall be a series of Preferred Stock, par value $1.00
     per share, of the Corporation, to be designated "Series A Junior
     Participating Preferred Stock," initially consisting of 100,000 shares.

          Section 1. Designation and Amount.  The shares of such series shall
                     -----------------------
     be designated as "Series A Junior Participating Preferred Stock," par value
     $1.00 per share, and the number of shares constituting such series shall be
     100,000.

          Section 2. Dividends and Distributions.
                     ----------------------------

               (a)   Subject to the prior and superior right of the holders of
          any shares of any series of Preferred Stock ranking prior and superior
          to the shares of Series A Junior Participating Preferred Stock with
          respect to dividends, the holders of shares of Series A Junior
          Participating Preferred Stock shall be entitled to receive when, as
          and if declared by the Board of Directors out of funds legally
          available for the purpose, quarterly dividends payable in cash on the
          last day of September, December, March and June in each year (each
          such date being referred to herein as a "Quarterly Dividend Payment
          Date"), commencing on the first Quarterly Dividend Payment Date after
          the first issuance of a share or fraction of a share of Series A
          Junior

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          Participating Preferred Stock, in an amount per share (rounded to the
          nearest cent) equal to, subject to the provision for adjustment
          hereinafter set forth, 10,000 times the aggregate per share amount of
          all cash dividends, and 10,000 times the aggregate per share amount
          (payable in kind) of all non-cash dividends or other distributions
          other than a dividend payable in shares of Common Stock or a
          subdivision of the outstanding shares of Common Stock (by
          reclassification or otherwise), declared on the Common Stock of the
          Corporation (the "Common Stock") since the immediately preceding
          Quarterly Dividend Payment Date, or, with respect to the first
          Quarterly Dividend Payment Date, since the first issuance of any share
          or fraction of a share of Series A Junior Participating Preferred
          Stock.

               (b)    The Corporation shall declare a dividend or distribution
          on the Series A Junior Participating Preferred Stock as provided in
          paragraph (a) above immediately after it declares a dividend payable
          in shares of Common Stock after the first issuance of any share or
          fraction of a share of Series A Junior Participating Preferred Stock.

               (c)    Dividends shall begin to accrue and be cumulative on
          outstanding shares of Series A Junior Participating Preferred Stock
          from the Quarterly Dividend Payment Date preceding the date of issue
          of such shares of Series A Junior Participating Preferred Stock,
          unless the date of issue of such shares is prior to the record date
          for the first Quarterly Dividend Payment Date, in which case dividends
          on such shares shall begin to accrue from the date of issue of such
          shares, or unless the date of issue is a Quarterly Dividend Payment
          Date or is a date after the record date for the determination of
          holders of shares of Series A Junior Participating Preferred Stock
          entitled to receive a quarterly dividend and before such Quarterly
          Dividend Payment Date, in either of which events such dividends shall
          begin to accrue and be cumulative from such Quarterly Dividend Payment
          Date. Accrued but unpaid dividends shall not bear interest. Dividends
          paid on the shares of Series A Junior Participating Preferred Stock in
          an amount less than the total amount of such dividends at the time
          accrued and payable on such shares shall be allocated pro rata on a
          share-by-share basis among all such shares at the time outstanding.
          The Board of Directors may fix a record date for the determination of
          holders of shares of Series A Junior Participating Preferred Stock
          entitled to receive payment of a dividend or distribution declared
          thereon, which record date shall be no more than thirty (30) days
          prior to the date fixed for the payment thereof.

          Section 3.  Voting Rights.  The holders of shares of Series A Junior
                      --------------
     Participating Preferred Stock shall have the following voting rights:

               (a)    Subject to the provision for adjustment hereinafter set
          forth, each share of Series A Junior Participating Preferred Stock
          shall entitle the holder thereof to 1,000 votes on all matters
          submitted to a vote of the stockholders of the Corporation.

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               (b)    Except as otherwise provided herein or by law, the holders
          of shares of Series A Junior Participating Preferred Stock and the
          holders of shares of Common Stock shall vote together as one class on
          all matters submitted to a vote of stockholders of the Corporation.

               (c)    Except as required by law, holders of Series A Junior
          Participating Preferred Stock shall have no special voting rights and
          their consent shall not be required (except to the extent they are
          entitled to vote with holders of Common stock as set forth herein) for
          taking any corporate action.

          Section 4.  Certain Restrictions.
                      ---------------------

               (a)    The Corporation shall not declare any dividend on, make
          any distribution on, or redeem or purchase or otherwise acquire for
          consideration any shares of Common Stock after the first issuance of a
          share or fraction of a share of Series A Junior Participating
          Preferred Stock unless concurrently therewith it shall declare a
          dividend on the Series A Junior Participating Preferred Stock as
          required by Section 2 hereof.

               (b)    Whenever quarterly dividends or other dividends or
          distributions payable on the Series A Junior Participating Preferred
          Stock as provided in Section 2 are in arrears, thereafter and until
          all accrued and unpaid dividends and distributions, whether or not
          declared, on shares of Series A Junior Participating Preferred Stock
          outstanding shall have been paid in full, the Corporation shall not:

                      (i)   declare or pay dividends on, make any other
               distributions on, or redeem or purchase or otherwise acquire for
               consideration any shares of stock ranking junior (either as to
               dividends or upon liquidation, dissolution or winding up) to the
               Series A Junior Participating Preferred Stock;

                    (ii)    declare or pay dividends on, make any other
               distributions on any shares of stock ranking on a parity (either
               as to dividends or upon liquidation, dissolution or winding up)
               with Series A Junior Participating Preferred Stock, except
               dividends paid ratably on the Series A Junior Participating
               Preferred Stock and all such parity stock on which dividends are
               payable or in arrears in proportion to the total amounts to which
               the holders of all such shares are then entitled;

                    (iii)   redeem or purchase or otherwise acquire for
               consideration shares of any stock ranking on a parity (either as
               to dividends or upon liquidation, dissolution or winding up) with
               the Series A Junior Participating Preferred Stock, provided that
               the Corporation may at any time redeem, purchase or otherwise
               acquire shares of any such parity stock in exchange for shares of
               any stock of the Corporation ranking junior (either as to
               dividends or upon dissolution, liquidation or winding up) to the
               Series A Junior Participating Preferred Stock; or

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                      (iv) purchase or otherwise acquire for consideration any
               shares of Series A Junior Participating Preferred Stock, or any
               shares of stock ranking on a parity with the Series A Junior
               Participating Preferred Stock, except in accordance with a
               purchase offer made in writing or by publication (as determined
               by the Board of Directors) to all holders of such shares upon
               such terms as the Board of Directors, after consideration of the
               respective annual dividend rates and other relative rights and
               preferences of the respective series and classes, shall determine
               in good faith that such purchase or acquisition will result in
               fair and equitable treatment among the respective series or
               classes.

               (c)    The Corporation shall not permit any subsidiary of the
          Corporation to purchase or otherwise acquire for consideration any
          shares of stock of the Corporation unless the Corporation could, under
          paragraph (a) of this Section 4, purchase or otherwise acquire such
          shares at such time and in such manner.

          Section 5.  Reacquired Shares.  Any shares of Series A Junior
                      ------------------
     Participating Preferred Stock purchased or otherwise acquired by the
     Corporation in any manner whatsoever shall be retired and cancelled
     promptly after the acquisition thereof.  All such shares shall upon their
     cancellation become authorized but unissued shares of Preferred Stock and
     may be reissued as part of a new series of Preferred Stock to be created by
     resolution or resolutions of the Board of Directors, subject to the
     conditions and restrictions on issuance set forth herein.

          Section 6.  Liquidation, Dissolution or Winding Up.
                      ---------------------------------------

               (a)    Upon any liquidation (voluntary or otherwise), dissolution
          or winding up of the Corporation, no distribution shall be made to the
          holders of shares of stock ranking junior (either as to dividends or
          upon liquidation, dissolution or winding up) to the Series A Junior
          Participating Preferred Stock unless, prior thereto, the holders of
          shares of Series A Junior Participating Preferred Stock shall have
          received an amount equal to accrued and unpaid dividends and
          distributions thereon, whether or not declared, to the date of such
          payment, plus an amount equal to the greater of (1) subject to the
          provisions for adjustment hereinafter set forth, $800,000 per share,
          provided that in the event the Corporation does not have sufficient
          assets, after payment of its liabilities and distribution to holders
          of Preferred Stock ranking prior to the Series A Participating
          Preferred Stock, available to permit payment in full of the $800,000
          per share amount, the amount required to be paid under this Section
          6(a)(1) shall, subject to Section 6(b) hereof, equal the value of the
          amount of available assets divided by the number of outstanding shares
          of Series A Participating Preferred Stock or (2) 10,000 times the
          aggregate per share amount to be distributed to the holders of Common
          Stock (the greater of (1) or (2), the "Series A Liquidation
          Preference"). In the event the Corporation shall at any time after the
          close of business on December 22, 2000 (the "Rights Declaration Date")
          (i) declare any dividend on Common Stock payable in shares of Common
          Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine
          the outstanding Common Stock into a

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          smaller number of shares, then in each such case the amount to which
          holders of shares of Series A Junior Participating Preferred Stock
          were entitled immediately prior to such event under clause (1) of the
          preceding sentence shall be adjusted by multiplying such amount by a
          fraction the numerator of which is the number of shares of Common
          Stock that were outstanding immediately prior to such event and the
          denominator of which is the number of shares of Common Stock that were
          outstanding immediately after such event.

               (b)    In the event, however, that there are not sufficient
          assets available to permit payment in full of the Series A Liquidation
          Preference and the liquidation preferences of all other series of
          Preferred Stock, if any, which rank on a parity with the Series A
          Junior Participating Preferred Stock, then such remaining assets shall
          be distributed ratably to the holders of such parity shares in
          proportion to their respective liquidation preferences.

          Section 7.  Consolidation, Merger, etc.  In case the Corporation
                      ---------------------------
     shall enter into any consolidation, merger, combination or other
     transaction in which the shares of Common Stock are exchanged for or
     changed into other stock or securities, cash and/or any other property,
     then in any such case the shares of Series A Junior Participating Preferred
     Stock shall at the same time be similarly exchanged or changed in amount
     per share (subject to the provision for adjustment hereinafter set forth)
     equal to 10,000 times the aggregate amount of stock, securities, cash
     and/or any other property (payable in kind), as the case may be, into which
     or for which each share of Common Stock is changed or exchanged.

          Section 8.  No Redemption.  The shares of Series A Junior
                      --------------
     Participating Preferred Stock shall not be redeemable.

          Section 9.  Ranking.  The Series A Junior Participating Preferred
                      --------
     Stock shall rank junior to all other series of the Corporation's Preferred
     Stock as to the payment of dividends and the distribution of assets, unless
     the terms of any such series shall provide otherwise.

          Section 10. Amendment.  The Certificate of Incorporation, as amended,
                      ----------
     of the Corporation shall not be further amended in any manner which would
     materially alter or change the powers, preference or special rights of the
     Series A Junior Participating Preferred Stock so as to affect them
     adversely without the affirmative vote of the holders of a majority or more
     of the outstanding shares of Series A Junior Participating Preferred Stock,
     voting separately as a class.

          Section 11. Fractional Shares.  Series A Junior Participating
                      ------------------
     Preferred Stock may be issued in fractions that are integral multiples of
     one one-millionth of one share, which shall entitle the holder, in
     proportion to such holder's fractional shares, to exercise voting rights,
     receive dividends, participate in distributions and to have the benefit of
     all other rights of holders of Series A Junior Participating Preferred
     Stock.

     4.   This Amended and Restated Certificate of Incorporation was duly
adopted by written consent of the stockholders in accordance with Section 228 of
the General Corporation Law of the

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State of Delaware and duly proposed and submitted by the Board of Directors of
this Corporation and duly adopted by the stockholders in accordance with
Sections 242 and 245 of the General Corporation Law of the State of Delaware.

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     IN WITNESS WHEREOF, said MICROSEMI CORPORATION has caused this certificate
to be signed by James J. Peterson, its President, and attested by David R.
Sonksen, its Secretary, this 9th day of August, 2001.


                               MICROSEMI CORPORATION

                               By:  /s/ James J. Peterson
                                  ----------------------------------------------
                                  James J. Peterson, Chief Executive Officer and
                                  President

ATTEST:

By:  /s/ David R. Sonksen
   -----------------------------------------
   David R. Sonksen, Executive Vice President,
   Chief Financial Officer and Secretary

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