公开(公告)号：US20160182999A1

公开(公告)日：2016-06-23

申请号：US14838437

申请日：2015-08-28

Applicant: STMicroelectronics (Alps) SAS

Inventor： Christian FRAISSE ,  Angelo NAGARI

IPC: H04R3/00 ,  H03F3/181

CPC classification number: H04R3/007 ,  H03F3/181

Abstract: A circuit may include an audio amplifier (314) configured to amplify an input signal (SAUDIO) to generate an output signal (SOUT+, SOUT−) suitable for driving a loud speaker (316). A first circuit (318) may be configured to generate a first analog signal (SI) based on a current level drawn by the loud speaker (316), and a second circuit (320) may be configured to generate a second analog signal (SV) based on a voltage supplied across the loud speaker (316). A third circuit (322, 312) may be configured to generate a third analog signal (RESIDUE) based on the difference between the first and second analog signals, and modify the input signal (SAUDIO) based on the third analog signal.

Abstract translation: 电路可以包括被配置为放大输入信号（SAUDIO）以产生适于驱动扬声器（316）的输出信号（SOUT +，SOUT-）的音频放大器（314）。 第一电路（318）可以被配置为基于由扬声器（316）绘制的电流电平来产生第一模拟信号（SI），并且第二电路（320）可以被配置为产生第二模拟信号（SV） ）基于提供在扬声器（316）上的电压。 第三电路（322,312）可以被配置为基于第一和第二模拟信号之间的差产生第三模拟信号（RESIDUE），并且基于第三模拟信号修改输入信号（SAUDIO）。