公开(公告)号：US09693138B2

公开(公告)日：2017-06-27

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.

公开(公告)号：US10021482B2

公开(公告)日：2018-07-10

申请号：US15598100

申请日：2017-05-17

Applicant: STMicroelectronics (Alps) SAS

Inventor： Christian Fraisse ,  Angelo Nagari

IPC: H04R3/00 ,  H03F3/181

CPC classification number: H04R3/007 ,  H03F3/181

Abstract: An audio device includes an audio amplifier configured to receive an input signal and generate a differential output signal. A first signal combiner circuit is configured to generate a time-convolution signal of an analog current signal and an analog voltage signal. The analog current signal corresponds to a current at the differential output signal, and the analog voltage signal corresponds to a voltage across the differential output signal. A second signal combiner circuit is configured to subtract the generated time-convolution signal from the input signal.

公开(公告)号：US20170257701A1

公开(公告)日：2017-09-07

申请号：US15598100

申请日：2017-05-17

Applicant: STMicroelectronics (Alps) SAS

Inventor： Christian Fraisse ,  Angelo Nagari

IPC: H04R3/00 ,  H03F3/181

CPC classification number: H04R3/007 ,  H03F3/181

Abstract: An audio device includes an audio amplifier configured to receive an input signal and generate a differential output signal. A first signal combiner circuit is configured to generate a time-convolution signal of an analog current signal and an analog voltage signal. The analog current signal corresponds to a current at the differential output signal, and the analog voltage signal corresponds to a voltage across the differential output signal. A second signal combiner circuit is configured to subtract the generated time-convolution signal from the input signal.