US Patent Issued to YAMAHA on March 24 for "Class-D amplifier" (Japanese Inventors)

ALEXANDRIA, Va., March 24 -- United States Patent no. 12,587,142, issued on March 24, was assigned to YAMAHA Corp. (Hamamatsu, Japan).

"Class-D amplifier" was invented by Yoshiro Miyake (Hamamatsu, Japan) and Masao Noro (Hamamatsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 th...