PLX Technology (PLXT) 10-K/A 2011 FY Annual report (amended)

EXHIBIT 31.3

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Ralph H. Schmittcertify that:

1. I have reviewed this annual report on Form 10-K/A of PLX Technology, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

/s/ Ralph H. Schmitt                                                                                                           

Dated: April 27, 2012

Ralph H. Schmitt

Chief Executive Officer

(Principal Executive Officer)