POWER OF ATTORNEY

I, Paul Cunningham, hereby authorize Lip-Bu Tan, John M. Wall, Alinka Flaminia,
Shirley X. Li, Ahalya Hildreth or Merritt Steele 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, the
Statements of Changes in Beneficial Ownership on Forms 4 and 5 and any
amendments and applications thereto, to be filed with the U.S. Securities and
Exchange Commission pursuant to Section 16(a) of the Securities Exchange Act of
1934, as amended, 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, is not
assuming, nor is the Company assuming, any of my responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934, as amended.

This authorization shall remain in effect until I am no longer required to file
forms under Section 16 of the Securities Exchange Act of 1934, as amended, with
respect to the Company's securities, unless earlier revoked in writing delivered
to the foregoing attorneys-in-fact.

Date: February 15, 2021

/s/ Paul Cunningham

Paul Cunningham