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:
Mar. 24, 2026
Filed:
Jul. 31, 2023
Yamaha Corporation, Hamamatsu, JP;
Yoshiro Miyake, Hamamatsu, JP;
Masao Noro, Hamamatsu, JP;
YAMAHA CORPORATION, Hamamatsu, JP;
Abstract
A single printed-circuit board of a class-D amplifier includes an input ground, an output ground, an input amplifying circuit, a modulation circuit, an output amplifying circuit, and an output filter, a solid pattern, a first feedback circuit, and a second feedback circuit. The solid pattern of the output ground extends into all regions of the input amplifying circuit, the modulation circuit, the output amplifying circuit and the output filter. The first feedback circuit executes a feedback where a voltage at a first connecting point is negatively fed back to an inverting input of the input amplifying circuit. The second feedback circuit executes a feedback where a voltage at a second connecting point is negatively fed back to a non-inverting input of the input amplifying circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile