公开(公告)号：WO2021195061A1

公开(公告)日：2021-09-30

申请号：PCT/US2021/023647

申请日：2021-03-23

申请人： QUALCOMM INCORPORATED

发明人： SILVA, Pradeep ,  SIVAKUMAR, Ramkumar ,  ZHOU, Qubo ,  ZHANG, Xinwang ,  LEE, Hanil ,  TANG, Dongyang ,  DHANASEKARAN, Vijayakumar

IPC分类号： H03F1/34 ,  H03F1/52 ,  H03F3/187 ,  H03F3/213 ,  H03F3/45 ,  H03F3/68 ,  H03F1/0288 ,  H03F1/526 ,  H03F2200/03 ,  H03F2200/252 ,  H03F2200/372 ,  H03F2200/381 ,  H03F2200/414 ,  H03F2200/417 ,  H03F2203/211 ,  H03F2203/45151 ,  H03F2203/45528 ,  H03F2203/45696 ,  H03F2203/45718 ,  H03F3/211 ,  H03F3/45475 ,  H04B1/40

摘要： A power amplifier provides reduction of click and pop in audio applications. The power amplifier includes a first amplifier and an auxiliary amplifier. The auxiliary amplifier is used to ramp the power amplifier output from ground to an offset voltage to reduce the "click and pop" sound. The first amplifier and the auxiliary amplifier having a shared feedback loop. An output of the first amplifier and an output of the auxiliary amplifier may be switchably coupled to the shared feedback loop. A wave generator controls a switch to couple the first amplifier output or the auxiliary amplifier output to the shared feedback loop.