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:
Jun. 23, 2026
Filed:
Sep. 17, 2023
Richtek Technology Corporation, HsinChu, TW;
Yi-Kuang Chen, Taichung, TW;
RICHTEK TECHNOLOGY CORPORATION, Zhubei City, TW;
Abstract
A class-D amplifier circuit includes an amplifier circuit, a PWM circuit, a power stage circuit, a pair of feedback circuits, and a common-mode control circuit. The amplifier circuit receives a differential input signal at differential input ends to generate a differential intermediate signal. The PWM circuit generates a PWM signal according to the differential intermediate signal. The power stage circuit generates a differential output signal at differential output ends according to the PWM signal. The common-mode control circuit controls first and second high bandwidth transconductance circuits according to the output common-mode voltage of the differential output signal, so as to generate first and second common-mode control currents, thereby providing a common-mode control signal at the differential input ends to regulate the input common-mode voltage of the differential input signal at a predetermined input common-mode level.