Exhibit 23.01
Consent of Independent Registered Public Accounting Firm
The Board of Directors
Cadence Design Systems, Inc.:
We consent to the use of our reports dated March 2, 2009, with respect to the consolidated balance
sheets of Cadence Design Systems, Inc. and subsidiaries as of January 3, 2009 and December 29,
2007, and the related consolidated statements of operations, stockholders’ equity and
comprehensive income (loss), and cash flows for each of the years in the three-year period ended
January 3, 2009, and the related financial statement schedule, and the effectiveness of internal
control over financial reporting as of January 3, 2009, incorporated herein by reference.
Our report dated March 2, 2009 refers to changes in the accounting for uncertainty in income
taxes, effective December 31, 2006, due to the adoption of Financial Accounting Standards Board
Interpretation (FIN) No. 48, Accounting for Uncertainty in Income Taxes—an interpretation of FASB
Statement No. 109.
Mountain View, California
May 26, 2009