EXHIBIT 23.1

              CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

  We consent to the incorporation by reference in the Registration Statements
on Form S-8 No. 333-40905 pertaining to the 1997 Employee Stock Purchase Plan,
No. 333-47185 pertaining to the 1982 Employee Incentive Stock Option Plan, the
1992 Employee Stock Option Plan and the 1997 Directors' Stock Option Plan, No.
333-76767 pertaining to the 1998 Employee Stock Purchase Plan, No. 333-74787
pertaining to the 1998 Cimaron Communications Corporation Stock Incentive Plan
and in the Registration Statement on Form S-3 No. 333-76185 pertaining to the
registration of shares issued upon the acquisition of Cimaron Communications
Corporation of Applied Micro Circuits Corporation of our report dated April
21, 1999, with respect to the consolidated financial statements and schedule
of Applied Micro Circuits Corporation included in the Annual Report on Form
10-K for the year ended March 31, 1999.

                                          Ernst & Young LLP

San Diego, California
June 21, 1999