公开(公告)号：US10063198B2

公开(公告)日：2018-08-28

申请号：US15555349

申请日：2015-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fang-Ching Lee ,  Yanhui Ren ,  Fushun Chen

IPC: H03F3/217 ,  H04R29/00 ,  H03F3/68

CPC classification number: H03F3/2175 ,  H03F3/185 ,  H03F3/68 ,  H03F2200/03 ,  H04Q3/00 ,  H04R3/12 ,  H04R5/04 ,  H04R29/00 ,  H04R2420/03 ,  H04R2420/05 ,  H04R2420/09

Abstract: A terminal device includes: an access unit, connected between a headset or an audio speaker and a digital-to-analog converter, and configured for insertion of a detachable second power amplifier; a processor, configured to: detect whether the second power amplifier is inserted into the access unit, output a first digital signal when detecting that the second power amplifier is inserted, and output a second digital signal when detecting that the second power amplifier is not inserted; the digital-to-analog converter, connected to the processor, and configured to: when receiving the first digital signal, convert the first digital signal to a first analog signal, and send the first analog signal to the second power amplifier; and when receiving the second digital signal, convert the second digital signal to a second analog signal, and send the second analog signal to a first power amplifier.