Exhibit 23.1


                         INDEPENDENT AUDITOR'S CONSENT


We consent to the incorporation by reference in Registration Statement No.
333-66758 on Form S-8 of PDF Solutions, Inc. of our report dated January 18,
2002 appearing in this Annual Report on Form 10-K of PDF Solutions, Inc. for
the year ended December 31, 2001.

/s/ DELOITTE & TOUCHE LLP

San Jose, California
March 29, 2002