Document:

EXHIBIT 10.b
                                                                    ------------

                 AMENDED AND RESTATED ARTICLES OF INCORPORATION
                                       OF
                          COLUMBIA BANKING SYSTEM, INC.

The undersigned, being the Secretary of Columbia Banking System, Inc., executes
in duplicate the following Amended and Restated Articles of Incorporation for
the corporation.

                                    ARTICLE 1
                                    ---------

SECTION 1.1 The name of the corporation shall be COLUMBIA BANKING SYSTEM, INC.

                                    ARTICLE 2
                                    ---------

SECTION 2.1 The corporation's period of duration shall be perpetual.

                                    ARTICLE 3
                                    ---------

SECTION 3.1 The purpose for which the corporation is organized is the
transaction of any and all lawful business for which corporations may be
incorporated under the Washington Business Corporation Act.

                                    ARTICLE 4
                                    ---------

SECTION 4.1 The aggregate number of shares which the corporation shall have
authority to issue is 51,975,000 common shares with no par value (hereinafter
referred to as "the common stock") and 2,000,000 preferred shares with no par
value (hereinafter referred to as "the preferred stock"). The preferred stock is
senior to the common stock, and the common stock is subject to the rights and
preferences of the preferred stock as provided in the following section.

SECTION 4.2 The board of directors is hereby vested with authority to divide any
or all of the preferred stock into one or more series and, within the
limitations set forth in the Washington Business Corporation Act (as amended
from time to time), to fix and determine or to amend the relative rights and
preferences of the shares of any series so established.

                                    ARTICLE 5
                                    ---------

SECTION 5.1 No shareholder shall have the preemptive right to acquire unissued
shares of the corporation.

                                    ARTICLE 6
                                    ---------

SECTION 6.1 Each shareholder entitled to vote at any election for directors
shall have the right to vote, in person or by proxy, the number of shares owned
by him for as many persons as there are

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directors to be elected and for whose election he has a right to vote, and no
shareholder shall be entitled to cumulate his votes.

                                    ARTICLE 7
                                    ---------

SECTION 7.1 The corporation reserves the right to amend, alter, change or repeal
any provision of its Articles of Incorporation to the extent permitted by the
laws of the State of Washington. All rights of shareholders are granted subject
to this reservation.

                                    ARTICLE 8
                                    ---------

SECTION 8.1 The address of the initial registered office of the corporation is
1301 Fifth Avenue, Suite 3400, Seattle, Washington 98101. The name of its
initial registered agent at that address is J. James Gallagher.

                                    ARTICLE 9
                                    ---------

SECTION 9.1 The corporation may enter into a contract and otherwise transact
business as vendor, purchaser, or otherwise, with its directors, officers and
shareholders, and with corporations, associations, firms and entities in which
they are or may become interested as directors, officers, shareholders, members
or otherwise, as freely as though such adverse interest did not exist, even
though the vote, action or presence of such director, officer or shareholder may
be necessary to obligate the corporation upon such contract or transaction; and
in the absence of fraud, no such contract or transaction shall be avoided and no
such director, officer or shareholder shall be held liable to account to the
corporation, by reason of such adverse interest or any fiduciary relationship to
the corporation arising out of such office or stock ownership, for any profit or
benefit realized by him through any such contract or transaction; provided that
the nature of the interest of such director, officer or shareholder, though not
necessarily the details or extent thereof, be disclosed or known to the board of
directors or shareholders of the corporation, at the meeting thereof at which
such contract or transaction is authorized or confirmed. A general notice that a
director, officer or shareholder of the corporation is interested in any
corporation, association, firm or entity shall be sufficient disclosure as to
such director, officer or shareholder with respect to all contracts and
transactions with that corporation, association, firm or entity.

                                   ARTICLE 10
                                   ----------

SECTION 10.1 Nominations for election to the board of directors may be made by
the board of directors or by any stockholder of any outstanding class of stock
of the corporation entitled to vote for the election of directors. Nominations,
other than those made by the board of directors, shall be made in writing and
shall be delivered or mailed, U.S. mail, postage prepaid, to the Chairman of the
corporation not less than fourteen (14) days nor more than fifty (50) days prior
to any meeting of shareholders called for the election of directors; provided,
however, that if less than twenty-one days' notice of the meeting is given to
shareholders, such nomination shall be delivered or mailed, U.S. mail, postage
prepaid, to the Chairman of the corporation not later than the close of business
on the seventh day following the day on which the notice of meeting was

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mailed. Such notification shall contain the following information to the extent
known to the notifying shareholder:

         (a)  The name and address of each proposed nominee;

         (b)  The principal occupation of each proposed nominee;

         (c)  The total number of shares of stock of the corporation that will
              be voted for each proposed nominee;

         (d)  The name and address of the notifying shareholder; and

         (e)  The number of shares of common stock of the corporation owned by
              the notifying shareholder.

Nominations not made in accordance herewith may, in his discretion, be
disregarded by the Chairman of the meeting, and upon his instructions, the vote
teller may disregard all votes cast for such nominee.

                                   ARTICLE 11
                                   ----------

SECTION 11.1 In addition to the requirements of any applicable statute, and
notwithstanding any other provisions of any other articles of these Articles of
Incorporation, the affirmative vote of not less than 66 2/3% of the total shares
attributable to persons other than a Control Person (as defined below),
considered for the purposes of this Article 11 as one class, which are entitled
to be voted in an election of directors shall be required for the approval of
any Business Combination (as defined below) between the corporation and any
Control Person.

SECTION 11.2 The approval requirements of Section 11.1 shall not apply if
either:

         (a)  The Business Combination is approved by at least a majority of
              Continuing Directors (as defined below) of the corporation; or

         (b)  All the following conditions are satisfied:

              (i) The cash or fair market value of the property, securities or
other consideration to be received per share in the Business Combination by
holders of the common stock of the corporation is not less than the higher of:
(A) the highest price per share (including brokerage commissions, soliciting
dealers, fees and dealer-management compensation) paid by such Control Person in
acquiring any of its holdings of the corporation's common stock; (B) the highest
per share market price of the common stock during the three-month period
immediately preceding the date of the proxy statement described in (iii) below;
or (C) the per share value of the common stock at the end of the fiscal quarter
immediately prior to the Business Combination, as determined by an appraisal
prepared by persons, selected by the Continuing Directors, who are

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independent of the corporation and the Control Person, and who are experienced
and expert in the area of corporate appraisal.

              (ii) After becoming a Control Person and prior to the consummation
of such Business Combination (A) such Control Person shall not have acquired any
newly issued shares of capital stock, directly or indirectly, from the
corporation (except upon conversion of convertible securities acquired by it
prior to becoming a Control Person or upon compliance with the provisions of
this Article 11 or as a result of a pro rata stock dividend or stock split), and
(B) such Control Person shall not have received the benefit, directly or
indirectly (except proportionately as a stockholder), of any loans, advances,
guarantees, pledges or other financial assistance or tax credits provided by the
corporation, or made any major changes in the corporation's business or equity
capital structure; and

              (iii) A proxy statement responsive to the requirements of the
Securities Exchange Act of 1934, whether or not the corporation is then subject
to such requirements, shall be mailed to the public stockholders of the
corporation for the purpose of soliciting stockholder approval of such Business
Combination.

SECTION 11.3  For the purpose of this Article 11

(a) The term "Business Combination" shall mean (i) any merger or consolidation
of the corporation with or into a Control Person, (ii) any sale, lease,
exchange, transfer or other disposition, including without limitation a mortgage
or any other security device, of all or any Substantial Part (as defined below)
of the assets of the corporation (including without limitation any voting
securities of a subsidiary) or of a subsidiary, to a Control Person, (iii) any
merger or consolidation of a Control Person with or into the corporation or a
subsidiary of the corporation, (iv) any sale, lease, exchange, transfer or other
disposition of all or any Substantial Part of the assets of a Control Person to
the corporation or a subsidiary of the corporation, (v) the issuance of any
securities of the corporation or a subsidiary of the corporation to a Control
Person, (vi) the acquisition by the corporation or a subsidiary of the
corporation of any securities of a Control Person, (vii) any reclassification of
common stock of the corporation, or any recapitalization involving common stock
of the corporation, consummated within five years after a Control Person becomes
a Control Person, or (viii) any agreement, contract or other arrangement
providing for any of the transactions described in this definition of Business
Combination;

(b) The term "Continuing Director" shall mean (i) a director who was a member of
the board of directors of the corporation immediately prior to the time that a
Control Person became the beneficial owner (as this term is defined in Rule
13d-3 of the General Rules and Regulations under the Securities Exchange Act of
1934 on the date on which this amendment becomes effective) of 10% or more of
the outstanding shares of common stock of the corporation or (ii) a person so
designated before initially becoming a director by a majority of the then
Continuing Directors.

(c) The term "Control Person" shall mean and include any individual,
corporation, partnership or other person or entity which, together with their
Affiliates and Associates (as those terms

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are defined on the date on which this amendment becomes effective in Rule 12b-2
of the General Rules and Regulations under the Securities Exchange Act of 1934)
is the beneficial owner in the aggregate of 20% or more of the outstanding
shares of common stock of the corporation, and any Affiliate or Associate of any
such individual, corporation, partnership or other person or entity;

(d) The term "Substantial Part" shall mean more than 10% of the total assets of
the corporation in question, as of the end of its most recent fiscal year prior
to the time the determination is being made;

(e) Without limitation, any shares of common stock of the corporation which any
Control Person has the right to acquire at any time pursuant to any agreement,
or upon exercise of conversion rights, warrants or options, or otherwise, shall
be deemed outstanding and beneficially owned by such Control Person for purposes
of this Article 11; and

(f) For the purposes of Section 11.2(b)(i) of this Article 11, the phrase "other
consideration to be received" shall include, without limitation, common stock of
the corporation retained by its existing public stockholders in the event of a
Business Combination with such Control Person in which the corporation is the
surviving corporation.

SECTION 11.4 For the purposes of this Article 11, a majority of the Continuing
Directors shall have the power and duty to determine on the basis of information
known to them (a) whether a proposed transaction is subject to the provisions of
this Article 11, (b) the amount of shares of the corporation Beneficially Owned
by any person, (c) whether a person is an Affiliate or Associate of another, and
(d) such other matters as to which a determination may be required by the
provisions of this Article 11.

SECTION 11.5 The provisions set forth in this Article 11 may not be repealed or
amended in any respect or in any manner including any merger or consolidation of
the corporation with any other corporation unless the surviving corporation's
Articles of Incorporation contain an article to the same effect as this Article
11, except by the affirmative vote of the holders of not less than 66 2/3% of
the outstanding shares of common stock of the corporation, subject to the
provisions of any series of preferred stock which may at the time be
outstanding; provided, however, that if there is a Control Person such action
must be approved by not less than 66 2/3% of the total shares entitled to be
voted in an election of directors attributable to shares owned by person other
than the Control Persons.

                                   ARTICLE 12
                                   ----------

SECTION 12.1 The board of directors of the corporation, when evaluating any
offer of another party to (a) make a tender or exchange offer for any equity
security of the corporation, (b) merge or consolidate the corporation with
another corporation, or (c) purchase or otherwise acquire all or substantially
all of the properties and assets of the corporation, shall, in connection with
the exercise of its judgment in determining what is in the best interests of the
corporation and its stockholders, give due consideration to all relevant
factors, including without limitation the social and economic effects on the
employees, customers, suppliers and other constituents of the

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corporation and its subsidiaries and on the communities in which the corporation
and its subsidiaries operate or are located.

                                   ARTICLE 13

SECTION 13.1  Defined Terms.  As used in this Article 13:

(a) "Egregious conduct" by a person shall mean acts or omissions that involve
intentional misconduct or a knowing violation of law, conduct violating section
23B. of the Revised Code of Washington, or participation in any transaction from
which the person will personally receive a benefit in money, property, or
services to which the person is not legally entitled.

(b) "Finally adjudged" shall mean stated in a judgment based upon clear and
convincing evidence by a court having jurisdiction, from which there is no
further right to appeal.

(c) "Director" shall mean any person who is a director of the corporation and
any person who, while a director of the corporation, is serving at the request
of the corporation as a director, officer, partner, trustee, employee, or agent
of another foreign or domestic corporation, partnership, joint venture, trust,
or other enterprise, or is a fiduciary or party in interest in relation to any
employee benefit plan covering any employee of the corporation or of any
employer in which it has an ownership interest; and "conduct as a director"
shall include conduct while a director is acting in any of such capacities.

(d) "Officer-director" shall mean any person who is simultaneously both an
officer and director of the corporation and any person who, while simultaneously
both an officer and director of the corporation, is serving at the request of
the corporation as a director, officer, partner, trustee, employee, or agent of
another foreign or domestic corporation, partnership, joint venture, trust, or
other enterprise, or is a fiduciary or party in interest in relation to any
employee benefit plan covering any employee of the corporation or of any
employer in which it has an ownership interest; and "conduct as an
officer-director" shall include conduct while an officer-director is acting as
an officer of the corporation or in any of such other capacities.

(e) "Subsidiary corporation" shall mean any corporation at least eighty percent
of the voting stock of which is held beneficially by this corporation.

SECTION 13.2 - LIABILITY OF DIRECTORS. No director, officer-director, former
director or former officer-director of the corporation shall be personally
liable to the corporation or its shareholders for monetary damages for conduct
as a director or officer-director occurring after the effective date of this
Article 13 unless the conduct is finally adjudged to have been egregious
conduct, as defined herein.

SECTION 13.3 - LIABILITY OF SUBSIDIARY DIRECTORS. No director, officer-director,
former director, or former officer-director of a subsidiary corporation shall be
personally liable in any action brought directly by this corporation as a
shareholder of the subsidiary corporation or derivatively on behalf of the
subsidiary corporation (or by any shareholder of this corporation
double-

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derivatively on behalf of this corporation and the subsidiary
corporation) for monetary damages for conduct as a director or officer-director
of such subsidiary corporation occurring after the effective date of this
Article 13 unless the conduct is finally adjudged to have been egregious
conduct, as defined herein.

SECTION 13.4 - INDEMNIFICATION OF DIRECTORS. The corporation shall indemnify any
person who is, or is threatened to be made, a party to any action, suit, or
proceeding, whether civil, criminal, administrative, or investigative, and
whether by or in the right of the corporation or its shareholders or by any
other party, by reason of the fact that the person is or was a director or
officer-director of the corporation or of a subsidiary corporation against
judgments, penalties or penalty taxes, fines, settlements (even if paid or
payable to the corporation or its shareholders or to a subsidiary corporation)
and reasonable expenses, including attorneys' fees, actually incurred in
connection with such proceeding unless the liability and expenses were on
account of conduct finally adjudged to be egregious conduct, as defined herein.
The reasonable expenses, including attorneys' fees, of such person incurred in
connection with such proceeding shall be paid or reimbursed by the corporation,
upon request of such person, in advance of the final disposition of such
proceeding upon receipt by the corporation of a written, unsecured promise by
the person to repay such amount if it shall be finally adjudged that the person
is not eligible for indemnification. All expenses incurred by such person in
connection with such proceeding shall be considered reasonable unless finally
adjudged to be unreasonable.

SECTION 13.5 - PROCEDURE. No action by the board of directors, the shareholders,
independent counsel, or any other person or persons shall be necessary or
appropriate to the determination of the corporation's indemnification obligation
in any specific case, to the determination of the reasonableness of any expenses
incurred by a person entitled to indemnification under this Article 13, nor to
the authorization of indemnification in any specific case.

SECTION 13.6 INTERNAL CLAIMS EXPECTED. Notwithstanding section 13.4, the
corporation shall not be obligated to indemnify any person for any expenses,
including attorneys' fees, incurred to assert any claim against the corporation
(except a claim based on section 13.7) or any person related to or associated
with it, including any person who would be entitled hereby to indemnification in
connection with the claim.

SECTION 13.7 - ENFORCEMENT OF RIGHTS. The corporation shall indemnify any person
granted indemnification rights under this Article 13 against any reasonable
expenses incurred by the person to enforce such rights.

SECTION 13.8 - SET-OFF OF CLAIMS. Any person granted indemnification rights
herein may directly assert such rights in set-off of any claim raised against
the person by or in the right of the corporation and shall be entitled to have
the same tribunal which adjudicates the corporation's claim adjudicate the
person's entitlement to indemnification by the corporation.

SECTION 13.9 - CONTINUATION OF RIGHTS. The indemnification rights provided in
this Article 13 shall continue as to a person who has ceased to be a director or
officer-director and shall inure to the benefit of the heirs, executors, and
administrators of such person.

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SECTION 13.10 - EFFECT OF AMENDMENT OR REPEAL. Any amendment or repeal of this
Article 13 shall not adversely affect any right or protection of a director,
officer-director, former director or former officer-director existing at the
time of such amendment or repeal with respect to acts or omissions occurring
prior to such amendment or repeal.

SECTION 13.11 - SEVERABILITY OF PROVISIONS. Each of the substantive provisions
of this Article 13 is separate and independent of the others, so that if any
provision hereof shall be held to be invalid or unenforceable for any reason,
such invalidity or unenforceability shall not affect the validity or
enforceability of the other provisions.

                                   ARTICLE 14
                                   ----------

SECTION 14.1 The name and address of the incorporator is Mark C. Lewington, 1301
Fifth Avenue, Suite 3400, Seattle, WA 98101.

These Amended and Restated Articles of Incorporation correctly set forth without
change the corresponding provisions of the Articles of Incorporation as
heretofore amended, and supersede the original Articles of Incorporation and all
amendments thereto.

Executed in duplicate this 26th day of April, 2000.
                           ----

                                                   COLUMBIA BANKING SYSTEM, INC.

                                                   By:  /s/ Jill L. Myers
                                                        ------------------------
                                                        Jill L. Myers, Secretary

                                        8<PAGE>   1

                                                                     EXHIBIT 4.7

================================================================================

                             CONEXANT SYSTEMS, INC.

                               4311 JAMBOREE ROAD
                             NEWPORT BEACH, CA 92660

                          REGISTRATION RIGHTS AGREEMENT

                                  MAY __, 2000

================================================================================

<PAGE>   2

                             CONEXANT SYSTEMS, INC.

                          REGISTRATION RIGHTS AGREEMENT

         This Registration Rights Agreement (the "Agreement") is made as of May
__, 2000, between Conexant Systems, Inc., a Delaware corporation (the "Parent")
and certain former shareholders (the "Shareholders") of Sierra Imaging, Inc., a
California corporation (the "Company") identified on EXHIBIT A hereto.

         WHEREAS:

         A. Pursuant to the terms of the Agreement and Plan of Merger dated as
of even date herewith (the "Merger Agreement"), by and among Parent, the
Company, and Griffindor Acquisition Corporation, a California corporation and
wholly owned subsidiary of Parent ("Merger Sub"), Merger Sub is being merged
with and into the Company (the "Merger"), with the Company being the surviving
corporation.

         B. In connection with the Merger, the Shareholders shall receive fully
paid and non-assessable shares (the "Shares") of common stock of Parent, par
value $1.00 per share ("Parent Common Stock").

         C. The Merger Agreement provides for the execution and delivery of this
Agreement at the closing of the transactions contemplated thereby which grants
the Shareholders certain rights to have their Shares registered under the
Securities Act of 1933, as amended.

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants contained herein and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereby
agree as follows:

                                   SECTION 1

                 RESTRICTIONS ON TRANSFERABILITY OF SECURITIES;
               COMPLIANCE WITH SECURITIES ACT; REGISTRATION RIGHTS

         1.1 CERTAIN DEFINITIONS. Unless otherwise indicated, the terms in this
Agreement shall have the same meanings as those terms in the Merger Agreement.
As used in this Agreement, the following terms shall have the following
respective meanings:

         "Commission" shall mean the Securities and Exchange Commission or any
other federal agency at the time administering the Securities Act.

         "Common Stock" shall mean Parent Common Stock, par value $1.00 per
share.

<PAGE>   3

         "Holder" shall mean (i) the Shareholders and (ii) any person holding
Registrable Securities to whom the rights under this Section 1 have been
transferred in accordance with Section 1.8 hereof.

         "Registrable Securities" means the Shares until such time that such
securities have been (i) effectively registered under the Securities Act and
disposed of pursuant to an effective Registration Statement, or (ii) sold in a
single transaction exempt from the registration and prospectus delivery
requirements of the Securities Act so that all transfer restrictions and
restrictive legends with respect thereto are removed upon the consummation of
such sale.

         The terms "register," "registered" and "registration" refer to a
registration effected by preparing and filing a registration statement in
compliance with the Securities Act, and the declaration or ordering of the
effectiveness of such registration statement.

         "Registration Expenses" shall mean all expenses, except as otherwise
stated below, incurred by Parent in complying with Section 1.2 hereof,
including, without limitation, all registration, qualification and filing fees,
printing expenses, escrow fees, fees and disbursements of counsel for Parent,
blue sky fees and expenses, the expense of any special audits incident to or
required by any such registration.

         "Securities Act" shall mean the Securities Act of 1933, as amended, or
any similar federal statute and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time.

         "Selling Expenses" shall mean all underwriting discounts, selling
commissions and stock transfer taxes applicable to the securities registered by
the Holders and, except as set forth above, all reasonable fees and
disbursements of counsel for any Holder.

         "Shares" shall mean the shares of Common Stock of Parent, par value
$1.00 per share, issued to the Shareholders pursuant to the Merger Agreement,
including the Escrow Shares (as defined in the Merger Agreement) and any other
securities issued in respect of such securities upon any stock split, stock
dividend, recapitalization, merger, consolidation or similar event.

         1.2 MANDATORY REGISTRATION. Parent shall prepare within a reasonable
time but in any event within forty five (45) days after the closing of the
Merger file with the Commission a registration statement (the "Registration
Statement") on Form S-3 (or, if Form S-3 is not then available to Parent, on
such form of registration statement as is then available to effect a
registration for resale of the Registrable Securities, subject to the Holder's
consent) covering the resale of the Shares by the Holders. Parent shall use its
commercially reasonable efforts to cause the Registration Statement to be
declared effective no later than 90 days after the issuance of the Shares (the
"Effective Date").

         1.3 EXPENSES OF REGISTRATION. All Registration Expenses incurred in
connection with all registrations pursuant to Section 1.2 shall be borne by
Parent. Unless otherwise stated, all Selling Expenses and all other Registration
Expenses shall be borne by the Holders of such securities pro rata on the basis
of the number of shares so registered.

                                     - 2 -
<PAGE>   4

         1.4 REGISTRATION PROCEDURES. At its expense Parent will:

                  (a) Prepare and file with the Commission the Registration
Statement with respect to the Shares and use its best efforts to cause such
Registration Statement to become effective as soon as possible after the filing
thereof, and keep the Registration Statement effective until the sale of all
Registrable Securities has been completed.

                  (b) Furnish to the Holders participating in such registration
and to the underwriters of the securities being registered, if any, such
reasonable number of copies of the registration statement, preliminary
prospectus, final prospectus and such other documents as such underwriters may
reasonably request in order to facilitate the public offering of such
securities.

         1.5 INDEMNIFICATION.

                  (a) Parent will indemnify each Holder, each of its officers
and directors and partners, and each person controlling such Holder within the
meaning of Section 15 of the Securities Act, with respect to which registration,
qualification or compliance has been effected pursuant to this Section 1, and
each underwriter, if any, and each person who controls any underwriter within
the meaning of Section 15 of the Securities Act, against all expenses, claims,
losses, damages or liabilities (or actions in respect thereof), including any of
the foregoing incurred in settlement of any litigation, commenced or threatened,
arising out of or based on any untrue statement (or alleged untrue statement) of
a material fact contained in any registration statement, prospectus, offering
circular or other document, or any amendment or supplement thereto, incident to
any such registration, qualification or compliance, or based on any omission (or
alleged omission) to state therein a material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances in
which they were made, not misleading, or any violation by Parent of the
Securities Act, the Exchange Act, state securities law or any rule or regulation
promulgated under such laws applicable to Parent in connection with any such
registration, qualification or compliance, and within a reasonable period Parent
will reimburse each such Holder, each of its officers and directors, and each
person controlling such Holder, each such underwriter and each person who
controls any such underwriter, for any legal and any other expenses reasonably
incurred in connection with investigating, preparing or defending any such
claim, loss, damage, liability or action; provided that Parent will not be
liable in any such case to the extent that any such claim, loss, damage,
liability or expense arises out of or is based on any untrue statement or
omission or alleged untrue statement or omission, made in reliance upon and in
conformity with written information furnished to Parent for use in the
Registration Statement.

                  (b) Each Holder will, if Registrable Securities held by such
Holder are included in the securities as to which such registration,
qualification or compliance is being effected, indemnify Parent, each of its
directors and officers, each underwriter, if any, of Parent's securities covered
by such a registration statement, each person who controls Parent or such
underwriter within the meaning of Section 15 of the Securities Act, and each
other such Holder, each of its officers and directors and each person
controlling such Holder within the meaning of Section 15 of the Securities Act,
against all claims, losses, damages and liabilities (or actions in respect
thereof) arising out of or based on any untrue statement (or alleged untrue
statement) of a material fact contained in any such

                                     - 3 -
<PAGE>   5

registration statement, prospectus, offering circular or other document, or any
omission (or alleged omission) to state therein a material fact required to be
stated therein or necessary to make the statements therein not misleading, and
within a reasonable period will reimburse Parent, such Holders, such directors,
officers, persons, underwriters or control persons for any legal or any other
expenses reasonably incurred in connection with investigating or defending any
such claim, loss, damage, liability or action, in each case to the extent, but
only to the extent, that such untrue statement (or alleged untrue statement) or
omission (or alleged omission) is made in such registration statement,
prospectus, offering circular or other document in reliance upon and in
conformity with written information furnished to Parent for use in the
Registration Statement. Notwithstanding the foregoing, the liability of each
Holder under this subsection (b) shall be limited in an amount equal to the
gross proceeds before expenses and commissions to each Holder received for the
shares sold by such Holder, unless such liability arises out of or is based on
willful misconduct by such Holder.

                  (c) Each party entitled to indemnification under this Section
1.5 (the "Indemnified Party") shall give notice to the party required to provide
indemnification (the "Indemnifying Party") promptly after such Indemnified Party
has actual knowledge of any claim as to which indemnity may be sought, and shall
permit the Indemnifying Party to assume the defense of any such claim or any
litigation resulting therefrom, provided that counsel for the Indemnifying
Party, who shall conduct the defense of such claim or litigation, shall be
approved by the Indemnified Party (whose approval shall not unreasonably be
withheld), and the Indemnified Party may participate in such defense at such
party's expense, and provided further that the failure of any Indemnified Party
to give notice as provided herein shall not relieve the Indemnifying Party of
its obligations under this Section 1 unless the failure to give such notice is
materially prejudicial to an Indemnifying Party's ability to defend such action
and provided further, that the Indemnifying Party shall not assume the defense
for matters as to which there is a conflict of interest or separate and
different defenses. No Indemnifying Party, in the defense of any such claim or
litigation, shall, except with the consent of each Indemnified Party, consent to
entry of any judgment or enter into any settlement which does not include as an
unconditional term thereof the giving by the claimant or plaintiff to such
Indemnified Party of a release from all liability in respect to such claim or
litigation.

         1.6 INFORMATION BY HOLDER. The Holder or Holders of Registrable
Securities included in any registration shall furnish to Parent such information
regarding such Holder or Holders, the Registrable Securities held by them and
the distribution proposed by such Holder or Holders as Parent may request in
writing and as shall be required in connection with any registration,
qualification or compliance referred to in this Section 1.

         1.7 TRANSFER OF REGISTRATION RIGHTS. The rights to cause Parent to
register securities granted Holders under Section 1.2 may be assigned to a
transferee or assignee which acquires at least 1000 shares of Registrable
Securities in connection with any transfer or assignment of Registrable
Securities by the Holders.

                                     - 4 -
<PAGE>   6

                                    SECTION 2

                                  MISCELLANEOUS

         2.1 GOVERNING LAW. This Agreement shall be governed in all respects by
the internal laws of the State of California.

         2.2 SURVIVAL. The covenants and agreements made herein shall survive
the closing of the transactions contemplated hereby.

         2.3 SUCCESSORS AND ASSIGNS. Except as otherwise provided herein, the
provisions hereof shall inure to the benefit of, and be binding upon, the
successors, assigns, heirs, executors and administrators of the parties hereto.

         2.4 ENTIRE AGREEMENT; AMENDMENT. This Agreement and the Merger
Agreement constitute the full and entire understanding and agreement between the
parties with regard to the subjects hereof and thereof, and no party shall be
liable or bound to any other party in any manner by any warranties,
representations or covenants except as specifically set forth herein or therein.
Except as expressly provided herein, neither this Agreement nor any term hereof
may be amended, waived, discharged or terminated other than by a written
instrument signed by the party against whom enforcement of any such amendment,
waiver, discharge or termination is sought; provided, however, that holders of a
majority of the Registrable Securities may, with Parent's prior written consent,
waive, modify or amend on behalf of all holders, any provisions hereof.

         2.5 NOTICES, ETC. All notices and other communications required or
permitted hereunder shall be in writing and shall be mailed by registered or
certified mail, postage prepaid, telecopied or otherwise delivered by hand or by
messenger, addressed (a) if to a Holder, at such address as such Holder shall
have furnished Parent in writing, or, until any such holder so furnishes an
address to Parent, then to and at the address of the last Holder who has so
furnished an address to Parent, or (b) if to Parent, one copy should be sent to
its address set forth on the cover page of this Agreement and addressed to the
attention of the President, or at such other address as Parent shall have
furnished to the Holders.

         Each such notice or other communication shall for all purposes of this
Agreement be treated as effective or having been given when delivered if
delivered personally, or, if sent by mail, at the earlier of its receipt or 72
hours after the same has been deposited in a regularly maintained receptacle for
the deposit of the United States mail, addressed and mailed as aforesaid.

         2.6 DELAYS OR OMISSIONS. Except as expressly provided herein, no delay
or omission to exercise any right, power or remedy accruing to any party to this
Agreement upon any breach or default of any other party under this Agreement,
shall impair any such right, power or remedy of such nondefaulting party nor
shall it be construed to be a waiver of any such breach or default, or an
acquiescence therein, or of or in any similar breach or default thereafter
occurring; nor shall any waiver of any single breach or default be deemed a
waiver of any other breach or default theretofore or thereafter occurring. Any
waiver, permit, consent or approval of any kind or character on the part of any
party of any breach or default under this Agreement, or any waiver on the part
of any holder of any provisions or conditions of this Agreement, must be in
writing and shall be effective only to the extent specifically set forth in such
writing. All remedies, either under this Agreement or by law or otherwise
afforded to any party to this Agreement, shall be cumulative and not
alternative.

                                     - 5 -
<PAGE>   7

         2.7 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be enforceable against the parties actually
executing such counterparts, and all of which together shall constitute one
instrument.

         2.8 SEVERABILITY. In the event that any provision of this Agreement
becomes or is declared by a court of competent jurisdiction to be illegal,
unenforceable or void, this Agreement shall continue in full force and effect
without said provision; provided that no such severability shall be effective if
it materially changes the economic benefit of this Agreement to any party.

         2.9 TITLES AND SUBTITLES. The titles and subtitles used in this
Agreement are used for convenience only and are not considered in construing or
interpreting this Agreement.

            (THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK)

                                     - 6 -
<PAGE>   8

         The foregoing Agreement is hereby executed as of the date first above
written.

                                        "PARENT"

                                        CONEXANT SYSTEMS, INC.
                                        a Delaware Corporation

                                        By:
                                             -----------------------------------
                                             Name:
                                             Title:

                                        "SHAREHOLDER"

                                        By:
                                             -----------------------------------
                                             Name:
                                             Title:

                (SIGNATURE PAGE TO REGISTRATION RIGHTS AGREEMENT)

                                     - 7 -
<PAGE>   9

                                    EXHIBIT A

                      SHAREHOLDERS OF SIERRA IMAGING, INC.

Shareholder:

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