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. 09, 2017
Filed:
Jul. 17, 2015
Applicant:
Yamaha Corporation, Hamamatsu-shi, Shizuoka, JP;
Inventors:
Yohei Otani, Hamamatsu, JP;
Masao Noro, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/217 (2006.01); H03F 1/34 (2006.01); H03F 3/45 (2006.01); H03F 3/185 (2006.01);
U.S. Cl.
CPC ...
H03F 1/342 (2013.01); H03F 3/185 (2013.01); H03F 3/2171 (2013.01); H03F 3/45475 (2013.01); H03F 2200/03 (2013.01); H03F 2200/129 (2013.01); H03F 2200/144 (2013.01); H03F 2200/153 (2013.01); H03F 2200/171 (2013.01); H03F 2200/301 (2013.01); H03F 2200/351 (2013.01); H03F 2200/391 (2013.01); H03F 2200/462 (2013.01); H03F 2200/546 (2013.01); H03F 2200/78 (2013.01); H03F 2203/45521 (2013.01); H03F 2203/45522 (2013.01); H03F 2203/45526 (2013.01); H03F 2203/45528 (2013.01);
Abstract
A power amplifier includes a class D amplification section and a load current feedback circuit. The class D amplification section includes an input section and a switching section serving as an output stage and switched depending on a signal input to the input section, and outputs current from a power source to a load via the switching section. The load current feedback circuit negatively feeds back the current flowing in the load to the input section of the class D amplification section.