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:
May. 13, 2025
Filed:
Nov. 18, 2020
Shanghai Awinic Technology Co., Ltd, Shanghai, CN;
Jianing Zhou, Shanghai, CN;
Haijun Zhang, Shanghai, CN;
Wei Yao, Shanghai, CN;
Liming Du, Shanghai, CN;
Jiantao Cheng, Shanghai, CN;
Hongjun Sun, Shanghai, CN;
SHANGHAI AWINIC TECHNOLOGY CO., LTD, Shanghai, CN;
Abstract
Disclosed are a digital audio power amplifier and a power amplifier loop. The power amplifier loop comprises an operational amplifier U, a capacitor C, a power amplifier output stage, a resistor R, a resistor Rand a noise control unit, wherein an inverting input end of the operational amplifier Uis respectively connected to one end of the capacitor C, one end of the noise control unit and an output end of a preceding DAC current source; an output end of the operational amplifier Uis respectively connected to a control end of the power amplifier output stage and the other end of the capacitor C; an output end of the power amplifier output stage is successively grounded by means of the resistors R, R; the other end of the noise control unit is connected to a connection point between the resistors R, R; the resistance values of the resistors R, Rare set to satisfy R/R=(N−2)/2, where N>2; the reference voltage of the operational amplifier Uis equal to PVDD/N, with PVDD being a power supply voltage of the power amplifier output stage; and the noise control unit is a resistor module. The present application ensures the normal operation of the digital audio power amplifier.