UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 14)*


                              Microsemi Corporation
                          -----------------------------
                                (Name of Issuer)


                     Common Stock, par value $.20 per share
                -------------------------------------------------
                         (Title of Class of Securities)


                                     940 570
                                 ---------------
                                 (CUSIP Number)



*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                                Page 1 of 4 Pages




--------------------------------------------------------------------------------
 1.   NAME OF REPORTING PERSON.
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Philip Frey, Jr.
--------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                (a) [_]
                                                                (b) [_]
--------------------------------------------------------------------------------
 3.   SEC USE ONLY

--------------------------------------------------------------------------------
 4.   CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
                     5.   SOLE VOTING POWER

                          1,675,028 (includes 208,750 shares issuable upon
                          conversion of convertible securities or option
   NUMBER OF              exercises within 60 days)
    SHARES         -------------------------------------------------------------
 BENEFICIALLY        6.   SHARED VOTING POWER
   OWNED BY
     EACH                 0
  REPORTING        -------------------------------------------------------------
    PERSON           7.   SOLE DISPOSITIVE POWER
     WITH
                          1,675,028 (includes 208,750 shares issuable upon
                          conversion of convertible securities or option
                          exercises within 60 days)
                   -------------------------------------------------------------
                     8.   SHARED DISPOSITIVE POWER

                          0
--------------------------------------------------------------------------------
 9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      1,675,028 (includes 208,750 shares issuable upon conversion of convertible
      securities or option exercises within 60 days)
--------------------------------------------------------------------------------
10.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

                                                                    [_]
--------------------------------------------------------------------------------
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      5.8%
--------------------------------------------------------------------------------
12.   TYPE OF REPORTING PERSON*

      IN
--------------------------------------------------------------------------------

                      *SEE INSTRUCTION BEFORE FILLING OUT!
                                Page 2 of 4 Pages





Item 1(a)         Name of Issuer:
--------------------------------
                  MICROSEMI CORPORATION

Item 1(b)         Address of Issuer's Principal Executive Offices:
-----------------------------------------------------------------
                  2830 South Fairview Street
                  Santa Ana, CA  92704

                  Mailing address:

                  P.O. Box 26890
                  Santa Ana, CA 92799-6890

Item 2(a)         Name of Person Filing:
---------------------------------------
                  Philip Frey, Jr.

Item 2(b)         Address of Principal Business Office or, if none, Residence:
-----------------------------------------------------------------------------
                  2830 South Fairview Street
                  Santa Ana, CA  92704

Item 2(c)         Citizenship:
-----------------------------
                  United States

Item 2(d)         Title of Class of Securities:
----------------------------------------------
                 (i) Common Stock, $.20 par value

Item 2(e)         CUSIP Number:
------------------------------
                 (i) 940-570

Item 3 If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b), check
whether the person filing is a:
-------------------------------------------------------------------------------
         (a) [_] Broker or Dealer registered under Section 15 of the Act
         (b) [_] Bank as defined in section 3(a)(6) of the Act
         (c) [_] Insurance Company as defined in section 3(a)(9) of the Act
         (d) [_] Investment Company registered under section 8 of the Investment
                 Company Act
         (e) [_] Investment Adviser registered under section 203 of the
                 Investment Advisers Act of 1940
         (f) [_] Employee Benefit Plan, Pension Fund which is subject to the
                 provisions of the Employee Retirement Income Security Act of
                 1974 or Endowment Fund: see Section 240.13d-1(b)(1)(ii)(F)
         (g) [_] Parent Holding Company, in accordance with
                 Section 240.13d-1(b)(ii)(G) (Note:  See Item 7)
         (h) [_] Group, in accordance with Section 240.13d-1(b)(1)(ii)(H)


                                Page 3 of 4 Pages




Item 4 Ownership:
----------------
(a)  Amount Beneficially owned:                                       1,675,028
(b)  Percent of Class:                                                     5.8%
(c)  Number of shares as to which such corporation has:
     (i)    sole power to vote or to direct the vote:                 1,675,028
     (ii)   shared power to vote or to direct the vote:                       0
     (iii)  sole power to dispose or to direct the disposition of:    1,675,028
     (iv)   shared power to dispose or to direct the disposition of:          0

Item 5 Ownership of Five Percent or Less of a Class:
---------------------------------------------------
         Not Applicable

Item 6 Ownership of More than Five Percent on Behalf of Another:
----------------------------------------------------------------
         Not Applicable

Item 7   Identification and Classification of the Subsidiary Which Acquired the
Security Being Reported on By the Parent Holding Company:
--------------------------------------------------------
         Not Applicable

Item 8 Identification and Classification of Members of the Group:
----------------------------------------------------------------
         Not Applicable

Item 9 Notice of Dissolution of Group:
-------------------------------------
         Not Applicable

Item 10 Certification:
---------------------
         Not Applicable

Signature:
---------
    After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

January 22, 2003
---------------------------------
Date

/s/ Philip Frey, Jr.
---------------------------------
Signature

Philip Frey, Jr., Individually
---------------------------------
Name/Title

                                Page 4 of 4 Pages