Document:

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                                                                     EXHIBIT 4.2

                       FIRST AMENDMENT TO RIGHTS AGREEMENT

                  First Amendment, dated as of February 9, 2000 (this
"Amendment"), to Rights Agreement, dated as of October 29, 1998 (the "Rights
Agreement"), between Technology Solutions Company, a Delaware corporation (the
"Company"), and ChaseMellon Shareholder Services, L.L.C., a New Jersey limited
liability company (the "Rights Agent").

                              W I T N E S S E T H :

                  WHEREAS, the Board of Directors of the Company, at a meeting
held on January 26, 2000 and based in part on the recommendation of the
Company's legal advisors, has determined that it is advisable and in the best
interest of the Company to amend the Rights Agreement as set forth below;

                  WHEREAS, at the date of this Amendment, the Distribution Date
has not occurred and there is no Acquiring Person; and

                                       1
<PAGE>   2

                  WHEREAS, in compliance with Section 27 of the Rights
Agreement, the Company and the Rights Agent are willing to amend the Rights
Agreement as hereinafter set forth and the Company and the Rights Agent have
each executed and delivered this Amendment.

                  NOW, THEREFORE, in consideration of the Rights Agreement and
the premises and mutual agreements herein set forth, the parties hereby agree as
follows:

                  1. The second sentence of Section 1(a) of the Rights Agreement
is hereby amended and restated to read as follows:

                  Notwithstanding the foregoing, no Person shall become an
                  "Acquiring Person" as the result of an acquisition of shares
                  of Common Stock by the Company which, by reducing the number
                  of shares outstanding, increases the proportionate number of
                  shares beneficially owned by such Person to 15% or more of the
                  shares of Common Stock then outstanding; provided, however,
                  that if a Person shall become the Beneficial Owner of 15% or
                  more of the shares of Common Stock then outstanding by reason
                  of share purchases by the Company and shall, after such share
                  purchases by the Company, become the Beneficial Owner of any
                  additional shares of Common Stock (other than pursuant to a
                  dividend or distribution paid or made by the Company on the
                  outstanding Common Stock or pursuant to a split or subdivision
                  of the outstanding Common Stock), then such Person shall be
                  deemed to be an "Acquiring Person".

                  2. The last paragraph of Section 1 of the Rights Agreement is
hereby amended by moving the word "and" appearing immediately before clause
(xxii) to immediately before clause (xxi) and deleting clause (xxii) in its
entirety.

                  3. Section 2 of the Rights Agreement is hereby amended by
adding the following sentence at the end thereof:

                  The Rights Agent shall have no duty to supervise, and in no
                  event shall be liable for, the acts or omissions of any such
                  co-Rights Agent.

                  4. The first sentence of Section 3(a) of the Rights Agreement
is hereby amended and restated to read as follows:

                                       2
<PAGE>   3

                  Until the earlier of (i) the Close of Business on the tenth
                  day after the Stock Acquisition Date (or, if the tenth day
                  after the Stock Acquisition Date occurs before the Record
                  Date, the Close of Business on the Record Date) or (ii) the
                  Close of Business on the tenth Business Day (or such later
                  date as may be determined by action of the Board of Directors
                  of the Company prior to such time as any Person becomes an
                  Acquiring Person) after the date that a tender or exchange
                  offer by any Person (other than the Company, any Subsidiary of
                  the Company, any employee benefit plan of the Company or of
                  any Subsidiary of the Company, or any Person organized,
                  appointed or established by the Company for or pursuant to the
                  terms of any such plan) is first published or sent or given
                  within the meaning of Rule 14d-2(a) of the General Rules and
                  Regulations under the Exchange Act, if upon consummation
                  thereof, such Person would be the Beneficial Owner of 15% or
                  more of the shares of Common Stock then outstanding (the
                  earlier of (i) and (ii) being herein referred to as the
                  "Distribution Date"), (x) the Rights will be evidenced
                  (subject to the provisions of paragraph (b) of this Section 3)
                  by the certificates for the Common Stock registered in the
                  names of the holders of the Common Stock (which certificates
                  for Common Stock shall be deemed also to be certificates for
                  Rights) and not by separate certificates and (y) the Rights
                  will be transferable only in connection with the transfer of
                  the underlying shares of Common Stock (including a transfer to
                  the Company).

                  5. Section 6(a) of the Rights Agreement is hereby amended by
adding the following sentence at the end thereof:

                  The Rights Agent shall have no duty or obligation to take any
                  action under any Section of this Agreement which requires the
                  payment by a Rights holder of applicable taxes and
                  governmental charges unless and until the Rights Agent is
                  satisfied that all such taxes and/or charges have been paid.

                  6. Section 11(o) of the Rights Agreement is hereby amended by
inserting the phrase ", Section 24" immediately after the phrase "Section 23".

                  7. Section 13(a) of the Rights Agreement is hereby amended by
deleting each occurrence of the phrase "or during the pendency of a 180 Day
Period".
                  8. Section 13(d) of the Rights Agreement is hereby deleted and
Section 13(e) of the Rights Agreement is hereby redesignated as Section 13(d).

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<PAGE>   4

                  9. Section 14 of the Rights Agreement is hereby amended by
adding Section 14(e), which shall read as follows:

                      (e) The Rights Agent shall have no duty or obligation with
                  respect to this Section 14 and Section 24(e) unless and until
                  it has received specific instructions (and sufficient cash, if
                  required) from the Company with respect to its duties and
                  obligations under such Sections.

                  10. Section 18(a) of the Rights Agreement is hereby amended
(i) by adding the phrase "(each as finally determined by a court of competent
jurisdiction)" immediately after the word "misconduct" and (ii) by adding the
word "punitive," immediately after the word "indirect,".

                  11. Section 20(c) of the Rights Agreement is hereby amended by
adding the phrase "(each as finally determined by a court of competent
jurisdiction)" immediately after the word "misconduct".

                  12.  Section 23(c) of the Rights Agreement is hereby deleted.

                  13. The third occurrence of the word "such" appearing in
Section 27 of the Rights Agreement and the last sentence of Section 27 of the
Rights Agreement are hereby deleted.

                  14. The first sentence of the first paragraph appearing on
page B-2 of the form of Rights Certificate attached as Exhibit B to the Rights
Agreement is hereby amended by inserting the phrase ", as the same may be
amended from time to time" immediately after the first occurrence of the phrase
"October 29, 1998".

                  15. The third full paragraph appearing on page B-3 of the form
of Rights Certificate attached as Exhibit B to the Rights Agreement is hereby
amended by deleting the

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<PAGE>   5

sentence "Under certain circumstances set forth in the Rights Agreement, the
Rights may not be redeemed for a period of one hundred eighty days (180)."

                  16. The last sentence of the first paragraph of the Summary of
Rights to Purchase Preferred Stock attached as Exhibit C to the Rights Agreement
is hereby amended and restated to read as follows:

                  The description and terms of the Rights are set forth in a
                  Rights Agreement, dated as of October 29, 1998 as amended by
                  the First Amendment dated as of February 9, 2000 thereto
                  (collectively, the "Rights Agreement"), between the Company
                  and ChaseMellon Shareholder Services, L.L.C., as Rights Agent.

                  17. The second paragraph of the Summary of Rights to Purchase
Preferred Stock attached as Exhibit C to the Rights Agreement is hereby amended
and restated to read as follows:

                  Initially, the Rights will be attached to all Common Stock
                  certificates representing shares then outstanding, and no
                  separate Rights certificates will be distributed. The Rights
                  will separate from the Common Stock and the Distribution Date
                  will occur upon the earlier of (i) 10 days following a public
                  announcement that a person or group of affiliated or
                  associated persons (an "Acquiring Person") has acquired, or
                  obtained the right to acquire, beneficial ownership of 15% or
                  more of the outstanding shares of Common Stock (the "Stock
                  Acquisition Date") or (ii) 10 business days (or such later
                  date as may be determined by action of the Board of Directors
                  prior to such time as any person or group becomes an Acquiring
                  Person) following the commencement of a tender offer or
                  exchange offer which, if consummated, would result in a person
                  or group beneficially owning 15% or more of the outstanding
                  shares of Common Stock.

                  18. The ninth paragraph of the Summary of Rights to Purchase
Preferred Stock attached as Exhibit C to the Rights Agreement is amended by
deleting the phrase "or during the pendency of a 180 day period".

                  19. The last sentence of the thirteenth paragraph of the
Summary of Rights to Purchase Preferred Stock attached as Exhibit C to the
Rights Agreement is hereby deleted.

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<PAGE>   6

                  20. The last sentence of the fifteenth paragraph of the
Summary of Rights to Purchase Preferred Stock attached as Exhibit C to the
Rights Agreement is hereby deleted.

                  21. This Amendment shall be deemed to be a contract made under
the laws of the State of Delaware and for all purposes shall be governed by and
construed with in accordance with the laws of such State applicable to contracts
to be made and performed entirely within such State.

                  22. This Amendment may be executed in two or more
counterparts, each of which shall for all purposes be deemed to be an original,
but all such counterparts shall together constitute one and the same instrument.

                  23. Any capitalized term used herein without definition shall
have the meaning specified in the Rights Agreement.

                  24. Except as otherwise expressly set forth herein, this
Amendment shall not by implication or otherwise alter, modify, amend or in any
other manner affect any of the terms, conditions, obligations, covenants or
agreements contained in the Rights Agreement, all of which are hereby ratified
and confirmed in all respects and shall continue in full force and effect.

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<PAGE>   7

                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed and attested, all as of the day and year first
above written.

Attest:                                  Technology Solutions Company

   By: /s/ Paul R. Peterson             By: /s/ Timothy P. Dimond
      --------------------------------     ----------------------------------
   Name:  Paul R. Peterson              Name:  Timothy P. Dimond
   Title: Secretary and General         Title: Senior Vice President and
          Counsel                              Chief Financial Officer

Attest:                                 ChaseMellon Shareholder Services, L.L.C.

   By: /s/ Lynore A. LeCouche           By: /s/ Lee Tinto
   ---------------------------------       -----------------------------------
   Name:  Lynore A. LeCouche            Name:  Lee Tinto
   Title: Vice President                Title: Vice President

                                       7<PAGE>   1

                                                                     EXHIBIT 4.1

 NEITHER THIS WARRANT NOR THE SECURITIES ISSUABLE UPON EXERCISE HEREOF HAS BEEN
  REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), OR THE
SECURITIES LAWS OF ANY STATE AND NEITHER THIS WARRANT NOR SUCH SECURITIES MAY BE
   SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
  STATEMENT UNDER SUCH ACT AND LAWS UNLESS RF MICRO DEVICES, INC. RECEIVES AN
     OPINION OF COUNSEL, WHICH MAY BE HOLDER'S IN-HOUSE COUNSEL, REASONABLY
   ACCEPTABLE TO IT THAT SUCH REGISTRATION IS NOT REQUIRED. TRANSFER OF THIS
                    WARRANT IS RESTRICTED. SEE PARAGRAPH 11.

250,000 Shares                                                WARRANT NO. 99-1

                             RF MICRO DEVICES, INC.

                          A North Carolina Corporation

                             (Void after 5:00 p.m.,
                     Washington D.C. Time, on June 30, 2001)

                  THIS CERTIFIES THAT, for value received, TRW Inc. (the
"Holder") is entitled at any time after December 31, 2000 and at any time before
5:00 p.m. Washington D.C. time on June 30, 2001 (the "Expiration Time") to
purchase up to 250,000 (two hundred fifty thousand) shares (the "RFMD Shares")
of common stock, no par value (the "Common Shares"), of RF Micro Devices, Inc.
(the "Company") at the price per RFMD Share as determined in paragraph 1 of this
Warrant, subject to adjustment as provided in paragraph 5 of this Warrant (that
price, as it may be adjusted from time to time, being referred to as the
"Warrant Price").

                  1. The Warrant Price shall be the average of the Closing
Prices of the Common Shares during the ten (10) Trading Days immediately
preceding December 31, 2000 (the "Pricing Period") multiplied by 0.75. The
Closing Price for each day shall be the reported last sales price regular way
or, in case no such reported sale takes place on

<PAGE>   2

such day, the average of the reported closing bid and asked prices regular way,
in either case on the New York Stock Exchange or, if the Common Shares are not
listed or admitted to trading on such Exchange, on the principal national
securities exchange on which the Common Shares are listed or admitted to trading
(based on the aggregate dollar value of all securities listed or admitted to
trading) or, if not listed or admitted to trading on any national securities
exchange, on the NASDAQ National Market System or, if the Common Shares are not
listed or admitted to trading on any national securities exchange or quoted on
the NASDAQ National Market System, the average of the closing bid and asked
prices in the over-the-counter market as furnished by any New York Stock
Exchange member firm selected from time to time by the Company for that purpose.
The Closing Prices during the Pricing Period shall be adjusted to take into
account any stock divisions, stock combinations, stock recapitalizations or
reclassifications, stock dividends and the like in order that the Closing Prices
during the entire Pricing Period shall have the same reference point as the
Closing Price immediately prior to December 31, 2000. The average of the Closing
Prices shall be a simple average and shall not be weighted according to trading
volume or any other manner. "Trading Day" shall mean a day on which the national
securities exchange or the NASDAQ National Market System used to determine the
Closing Price is open for the transaction of business or the reporting of trades
or, if the Closing Price is not so determined, a day on which the New York Stock
Exchange is open for the transaction of business.

                  2. To exercise this Warrant, this Warrant must be surrendered
prior to the Expiration Time at the office of the Company at 7625 Thorndike
Road, Greensboro, North Carolina 27409 (or such other address as the Company may
specify in writing to

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<PAGE>   3

the Holder of this Warrant at least ten days before this Warrant is exercised)
with the attached Notice of Exercise duly completed and executed, accompanied by
evidence of a wire transfer of immediately available funds to the Company's
money market account #__________ with Silicon Valley Bank, Santa Clara,
California, ABA Routing #__________ (or such other account as the Company may
specify in writing to the Holder of this Warrant at least ten days before this
Warrant is exercised) in full payment of the purchase price of the RFMD Shares
with respect to which this Warrant is exercised. This Warrant may be exercised
in whole or in part as to any whole number of RFMD Shares. If this Warrant is
exercised in part, upon surrender of this Warrant for exercise, the Company will
issue to the Holder a new Warrant to purchase the remaining number of RFMD
Shares which may be purchased upon exercise of this Warrant (before taking
account of adjustments by reason of paragraphs 5, 6 and 7) and the number of
RFMD Shares with respect to which it is exercised (before taking account of
adjustments by reason of paragraphs 5, 6 and 7). The new Warrant will bear the
same date as this Warrant and will be identical to this Warrant in all respects,
except as to the number of RFMD Shares as to which it may be exercised.

                  3. The RFMD Shares as to which this Warrant is exercised will
be deemed to be issued when this Warrant is exercised. Holder agrees that prior
to the exercise of this Warrant, it will comply with the provisions of the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR Act")
as in effect from time to time. If action is taken by the Federal Trade
Commission or the United States Department of Justice to enjoin Holder's
exercise of this Warrant, the Company agrees reasonably to cooperate with Holder
to contest such enjoinment at the expense of this Holder. A certificate
representing the RFMD Shares will be issued to the Holder of this

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<PAGE>   4

Warrant promptly after it is exercised. The certificate may bear a legend to the
effect that the RFMD Shares it represents have not been registered under the
Securities Act of 1933, as amended (the "Act"), or any applicable state
securities laws, and may only be transferred in a transaction registered under
the Act or such laws or exempt from the registration requirements of the Act or
such laws. In addition, any other legend required by any other agreement between
the Company and Holder may be included on the certificate or certificates for
such RFMD Shares.

                  4. This Warrant will expire, and the right to purchase the
RFMD Shares by exercise of this Warrant will terminate, at the Expiration Time;
provided, however, that if Holder has complied with the filing provisions of the
HSR Act at least thirty days prior to the Expiration Time, but the waiting
period imposed by the HSR Act has not terminated or lapsed, then the Expiration
Time will be extended until ten days after such termination or lapse. After that
time this Warrant will be void.

                  5. The Warrant Price will be subject to adjustment from time
to time as follows:

                  (a) If, at any time after December 31, 2000, the Company (i)
         pays a dividend on its Common Stock in Common Stock, (ii) splits or
         subdivides its outstanding shares of Common Stock, or (iii) combines
         its outstanding shares of Common Stock into a smaller number of shares,
         the Warrant Price in effect immediately prior to each of those events
         will be adjusted proportionately so that the adjusted Warrant Price
         will bear the same relation to the Warrant Price in effect immediately
         prior to the event as the total number of shares of Common Stock
         outstanding immediately prior to the event will bear to the total
         number of shares of Common Stock outstanding immediately after the
         event.

                                      -4-

<PAGE>   5

                  (b) An adjustment made pursuant to subparagraph (a) of this
         paragraph will become effective immediately after the corresponding
         record date in the case of a dividend and immediately after the
         effective date in the case of a subdivision or combination.

                  No adjustment of the Warrant Price will be made if the amount
of such adjustment would be less than 2% of the Warrant Price, but any such
adjustment that would otherwise be required to be made and has not previously
been made will be carried forward and be made at the time of and together with
the next subsequent adjustment which, together with all adjustments so carried
forward, amount in the aggregate to 2% or more of the Warrant Price. As used in
this Warrant, "Common Stock" includes any class of the Company's capital stock,
now or hereafter authorized, having the right to participate in the distribution
of either earnings or assets of the Company without limitation as to amount or
percentage. At no time will the Warrant Price be less than $.01 per share.

                  6. (a) In case the Company shall at any time or from time to
time (i) subdivide its outstanding shares of Common Stock into a greater number
of shares or (ii) combine its outstanding shares of Common Stock into a smaller
number of shares, then the number of RFMD Shares, in effect immediately prior to
such event, shall be proportionately increased in the case of a subdivision and
proportionately decreased in the case of combination. Any adjustment under this
subparagraph 6(a) shall become effective at the close of business on the date
the subdivision or combination becomes effective.

                  (b) In case the Company shall at any time or from time to time
makes, or fixes a record date for the determination of holders of the Common
Stock

                                      -5-

<PAGE>   6

entitled to receive, a dividend or other distribution payable in additional
shares of Common Stock, then and in such event the number of RFMD Shares then in
effect shall be increased as of the time of such issuance or, in the event such
record date is fixed, as of the close of business on such record date, by
multiplying the number of RFMD Shares then in effect by a fraction (x) the
denominator of which is the total number of shares of the Common Stock issued
and outstanding immediately prior to the time of such issuance or the close of
business on such record date, and (y) the numerator of which shall be the total
number of shares of the Common Stock issued and outstanding immediately prior to
the time of such issuance or the close of business on such record date plus the
number of shares of the Common Stock issuable in payment of such dividend or
distribution; provided, however, that if such record date is fixed and such
dividend is not fully paid or if such distribution is not fully made on the date
fixed therefor, the number of RFMD Shares shall be recomputed accordingly based
on the number of additional shares of Common Stock actually issued as of the
close of business on the date originally fixed for the payment of such dividend
or the making of such distribution and thereafter the number of RFMD Shares
shall be adjusted pursuant to this subparagraph 6(b) at the time of actual
payment of any additional dividends or distributions of Common Stock.

                  (c) In case the Company shall issue rights or warrants to all
or substantially all holders of its Common Stock entitling them to subscribe for
or purchase shares of Common Stock at a price per share less than the Fair
Market Value (as hereinafter defined) per share of the Common Stock on the date
fixed for the determination of shareholders entitled to receive such rights or
warrants, the number of RFMD Shares, in effect at the opening of business on the
day following the date fixed for such determination, shall be increased by
multiplying such number of RFMD Shares by a fraction of which the denominator
shall be the number of shares of Common Stock outstanding at the close of
business on the date fixed for such determination plus the

                                      -6-

<PAGE>   7

number of shares of Common Stock which the aggregate of the offering price of
the total number of shares of Common Stock so offered for subscription or
purchase would purchase at such Fair Market Value, and the numerator shall be
the number of shares of Common Stock outstanding at the close of business on the
date fixed for such determination plus the number of shares of Common Stock so
offered for subscription or purchase, such adjustment to become effective
immediately after the opening of business on the day following the date fixed
for such determination; provided, however, in the event that all the shares of
Common Stock offered for subscription or purchase are not delivered upon the
exercise of such rights or warrants, the number of RFMD Shares shall be
readjusted to the number of RFMD Shares that would have been in effect had the
numerator and the denominator of the foregoing fraction and the resulting
adjustment been made based upon the number of shares of Common Stock actually
delivered upon the number of shares of Common Stock offered for subscription or
purchase. For the purposes of this subparagraph (c), the number of shares of
Common Stock at any time outstanding shall not include shares held in the
treasury of the Company. "Fair Market Value" shall mean, as to shares of Common
Stock the simple average of the daily Closing Prices for the ten (10)
consecutive Trading Days immediately preceding the day in question.

                  7. (a) In case of a distribution to all holders of the
Company's Common Stock of shares of its capital stock (other than Common Stock)
or evidences of its indebtedness or property, or a capital reorganization of the
Company, a reclassification of the Common Stock, a consolidation of the Company
with or merger of the Company into another corporation or entity (but only if
such consolidation or merger is consummated after December 31, 2000) (other than
a consolidation or merger in which the Company is the continuing entity) or a
sale of the properties and assets of the Company (but only if such sale is
consummated after December 31, 2000) as, or

                                      -7-

<PAGE>   8

substantially as, an entirety and distribution of the proceeds of sale, after
such distribution, capital reorganization, reclassification, consolidation,
merger or sale, on exercise of this Warrant the Holder will receive the number
of shares of stock or other securities or property which the Holder would have
received if this Warrant had been exercised immediately before the first such
corporate event and the Holder had retained what it would have received as a
result of each such corporate event. The split or subdivision or combination of
shares of Common Stock at any time outstanding into a greater or lesser number
of shares of Common Stock will not be deemed to be a reclassification of the
Common Stock of the Company for the purposes of this paragraph. The Company will
not effect any consolidation or merger unless prior to or simultaneously with
its consummation the successor entity (if other than the Company) resulting from
the consolidation agrees in writing to deliver to the Holder of this Warrant on
exercise of this Warrant the shares of stock or other securities or property to
which the Holder becomes entitled because of that exercise.

                  (b) In the event that at any time prior to December 31, 2000,
the Company (i) consolidates or merges with another corporation or entity (other
than a consolidation or merger of the Company in which the Company is the
continuing entity) or (ii) sells its properties and assets as, or substantially
as, an entirety and distributes the proceeds, this Warrant shall terminate
immediately upon the consummation of such consolidation, merger or sale and the
Holder shall be promptly paid by the Company (or the Company's
successor-in-interest, as the case may be) a dollar amount equal to the number
of RFMD Shares purchasable hereunder multiplied by the positive difference (if
any) between the Closing Price of the Common Shares as of the last Trading Day
immediately prior to the effective date of such consolidation, merger or sale
and $71.50 (as adjusted for any stock divisions, stock combinations, stock
recapitalizations, stock reclassifications, stock dividends or similar
transactions occurring after the date of this Warrant).

                                      -8-

<PAGE>   9

                  8. Whenever the Warrant Price and/or the number of RFMD Shares
is adjusted as provided in this Warrant, the Company will compute the adjusted
Warrant Price and/or the number of RFMD Shares or other assets the Holder would
receive on exercise of this Warrant in full and will provide a notice to the
Holder within thirty (30) days of the date of such adjustment stating that the
Warrant Price and/or the number of RFMD Shares has been adjusted and setting
forth the adjusted Warrant Price and/or the number of RFMD Shares and what the
Holder would receive upon exercise of this Warrant in full. The Company will
also provide a notice to the Holder describing any event that would trigger an
adjustment in the Warrant Price and/or the number of RFMD Shares in the absence
of the last paragraph of paragraph 5. Such notice will be given within thirty
(30) days of the effective date of such event.

                  9. The Company will at all times keep a sufficient number of
authorized but unissued RFMD Shares to permit exercise in full of this Warrant.
The Company represents and warrants that all RFMD Shares which are delivered on
exercise of this Warrant (and payment of the Warrant Price therefor) will, upon
delivery, be duly issued, fully paid and non-assessable.

                  10. The Holder will not, by reason of holding this Warrant,
have any right to vote, to receive dividends or other distributions, or any
other rights of a shareholder, with regard to the RFMD Shares.

                  11. The Holder may not assign, sell or otherwise transfer,
dispose of, make any short sale of, pledge or hypothecate, grant any option for
the purpose of, or enter into any hedging, synthetic sale or similar transaction
with the same economic effect as a sale of, this Warrant or any of the Holder's
rights under it, except (i) to a corporation controlling, controlled by or under
common control with the Holder (which

                                      -9-

<PAGE>   10

shall take this Warrant subject to the transfer restrictions in this paragraph)
or (ii) by merger or consolidation of Holder with or into another corporation or
entity if the Holder is not the surviving corporation (which shall take this
Warrant subject to the transfer restrictions in this paragraph), and any
transfer or attempted transfer or other prohibited assignment of this Warrant
will be null and void and of no force or effect.

                  12. Any notices or other communications to the holder of this
Warrant will be addressed to TRW Inc., Space & Electronics Group, One Space
Park, Redondo Beach, California 90278, Attention: Vice President, Finance, with
a copy to TRW Inc., 1900 Richmond Road, Cleveland, Ohio 44124, Attention:
Secretary, or to such other address as the Holder may specify in writing to the
Company.

                  13. This Warrant will be governed by, and construed under, the
laws of the State of North Carolina.

                  14. This Warrant may not be modified without the written
consent of the Company and the Holder.

Dated: November 15, 1999                RF MICRO DEVICES, INC.

                                        By:  /s/ William A. Priddy
                                             ---------------------

                                      -10-

<PAGE>   11

                               NOTICE OF EXERCISE

                  By this Notice, TRW Inc. exercises the Warrant to which this
Notice is attached with respect to _______________ shares of the Common Stock of
RF Micro Devices, Inc.

                  TRW Inc. represents to RF Micro Devices, Inc. that TRW Inc.
will be acquiring the securities which are being purchased by exercise of the
Warrant for investment, and not with a view to their resale or distribution.

                  [Cross out the preceding paragraph if the resale of the shares
being issued on exercise of this Warrant has been registered under the
Securities Act of 1933, as amended.]

                                    TRW INC.

Dated: ____________________         By: __________________________

                                      -11=

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