The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2023
Filed:
Jan. 13, 2020
Shanghai Awinic Technology Co., Ltd, Shanghai, CN;
Zhifei Yang, Shanghai, CN;
Haijun Zhang, Shanghai, CN;
Wei Yao, Shanghai, CN;
Liming Du, Shanghai, CN;
Jiantao Cheng, Shanghai, CN;
SHANGHAI AWINIC TECHNOLOGY CO., LTD, Shanghai, CN;
Abstract
The present disclosure provides a current detection circuit for a loudspeaker, comprising a first detection resistor RSP, a second detection resistor RSN, a sampling selection circuit, an input selection circuit, and a processing circuit. By adding the sampling selection circuitand the input selection circuit, voltages on two ends of the corresponding detection resistors (RSP, RSN) are sampled according to the fact that potential differences of an output stage VOP and an output stage VON of a class-D audio power amplifierare in different semi-periods, and the current of the loudspeakeris obtained through processing, thereby detecting the current of the loudspeakerwithout adding an anti-clipping distortion function to the class-D audio power amplifier