公开(公告)号：US20180337637A1

公开(公告)日：2018-11-22

申请号：US15598389

申请日：2017-05-18

Applicant: QUALCOMM INCORPORATED

Inventor： Sherif GALAL ,  Subbarao Surendra CHAKKIRALA ,  Khaled ABDELFATTAH ,  Earl SCHREYER

IPC: H03F1/02 ,  H03F3/185 ,  H03F3/217 ,  H04R3/04

CPC classification number: H03F1/0216 ,  H03F1/0233 ,  H03F3/181 ,  H03F3/185 ,  H03F3/217 ,  H03F3/2175 ,  H03F2200/03 ,  H03F2200/351 ,  H03F2200/504 ,  H03F2200/555 ,  H04R3/04

Abstract: An amplifier circuit includes an amplifier and a voltage boost circuit configured to provide a variable supply voltage to the amplifier, the variable supply voltage continuously proportional to an audio input signal, the variable supply voltage configured to follow an output of the amplifier.