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:
Sep. 02, 2014
Filed:
Dec. 20, 2010
Applicant:
Nobuaki Tsuji, Hamamatsu, JP;
Inventor:
Nobuaki Tsuji, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power amplifying circuit includes a first field effect transistor and a second field effect transistor that are connected in series, are interposed between a high potential power line and a low potential power line, and drive a load; a predriver that generates, in response to an input signal, gate voltages applied to the first field effect transistor and the second field effect transistor respectively; and a variable power source that supplies source voltages to the high potential power line and the low potential power line respectively, and is configured to control the source voltages.