POWER OF ATTORNEY
I, Roger S. Siboni, hereby authorize Lip-Bu Tan, Geoffrey G. Ribar,
James J. Cowie, Yoonie Y. Chang, Shirley X. Li, Carmen Elliott,
or Elizabeth R. Geer of Cadence Design Systems, Inc., a Delaware corporation
 (the "Company"), to sign and file on my behalf the Initial Statement of
Beneficial  Ownership  of  Securities on  Form  3,  Statements  of
Changes in Beneficial Ownership on Forms 4 and 5, and any Amendments
and applications thereto, to be filed with the Securities and Exchange
Commission pursuant to Section 16(a) of the Securities Act of 1934
relating to my beneficial ownership of securities in the Company.

I hereby grant to each such attorney-in-fact full power and authority
to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as
I 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 such attorney-in-fact's 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.
I acknowledge that the foregoing attorney-in-fact, in serving in
such capacity at my request, are not assuming, nor is the Company
assuming, any of my responsibilities to comply with Section 16 of
the Securities Exchange Act of 1934.

This authorization shall remain in effect until I am no longer
required to file forms under Section 16(a) with respect to the
Company's securities, unless earlier revoked in writing delivered
to the foregoing attorneys-in-fact.

Date: February 8, 2016

/s/ Roger S. Siboni
Roger S. Siboni