AMCC 03.31.2013 EX 23.1

We consent to the incorporation by reference in the registration statements (Nos. 333-35408, 333-41572, 333-46584, 333-47185, 333-48912, 333-48914, 333-53282, 333-57202, 333-71878, 333-74787, 333-76767, 333-92507, 333-99623, 333-110075, 333-114327, 333-130589, 333-140052, 333-147297, 333-171960, 333-177773 and 333-183603) on Form S-8 of Applied Micro Circuits Corporation of our report dated June 10, 2013, with respect to the consolidated balance sheets of Applied Micro Circuits Corporation and its subsidiaries as of March 31, 2013 and 2012, and the related consolidated statements of operations, comprehensive loss, stockholders’ equity, and cash flows for each of the years in the three-year period ended March 31, 2013, the related consolidated financial statement schedule, and the effectiveness of internal control over financial reporting as of March 31, 2013, which report appears in the March 31, 2013 annual report on Form 10-K of Applied Micro Circuits Corporation.