POWER OF ATTORNEY


      	KNOW ALL MEN BY THESE PRESENTS, that the undersigned
hereby constitutes and appoints each of Joanne Norgart and
Fedenia Presa, signing singly, the undersigned's true and
lawful attorney-in-fact to:

      	1)  execute for and on behalf of the undersigned,
in the undersigned's capacity as an officer and/or director
of Altera Corporation (the "Company"), any and all Forms 3,
4 and 5 required to be filed by the undersigned in
accordance with Section 16(a) of the Securities Exchange
Act of 1934 and the rules thereunder;

      	2)  do and perform any and all acts for and on
behalf of the undersigned which may be necessary or
desirable to complete and execute any such Form 3, 4
or 5 and timely file such form with the United States
Securities and Exchange Commission and any stock exchange
or similar authority; and

      	3)  take any other action of any type whatsoever
in connection with the foregoing which, in the opinion
of the attorney-in-fact, may be of benefit to, in the
best interest of, or legally required by, the undersigned,
it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned, pursuant
to this Power of Attorney, shall be in such form and shall
contain such terms and conditions as such attorney-in-fact
may approve in his discretion.

      	The undersigned hereby grants to each such
attorney-in-fact full power and authority to do and perform
all and every act and thing whatsoever requisite, necessary,
and proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and
purposes as the undersigned might or could do if personally
present with full power of substitution or revocation, hereby
ratifying and confirming all that such attorney-in-fact, or
his substitute or substitutes, shall lawfully do or cause
to be done by virtue of this Power of Attorney and the rights
and powers herein granted.  The undersigned acknowledges that
no such attorney-in-fact, in serving in such capacity at the
request of the undersigned, is hereby assuming, nor is the
Company hereby assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Securities and
Exchange Act of 1934.

      	This Power of Attorney shall remain in full force and
effect until the undersigned is no longer required to file
Forms 3, 4 and 5 with respect to the undersigned's holdings of
and transactions in the securities issued by the Company, unless
earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorney-in-fact.

      	IN WITNESS WHEREOF, the undersigned has caused this
Power of Attorney to be executed as of the 24th day of
October, 2006.



      					Signature

      James Callas
      					Print Name
pa-1070511