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:
Jul. 13, 2010
Filed:
Aug. 22, 2008
Applicant:
Takashige Ogata, Ora-gun, JP;
Inventor:
Takashige Ogata, Ora-gun, JP;
Assignees:
Sanyo Electric Co., Ltd., Moriguchi, JP;
Sanyo Semiconductor Co., Ltd., Gunma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
An amplifying circuit comprising an output stage circuit composed of a first and a second output transistor and operating as a class AB push-pull circuit reduces electricity consumed by an idle current. A pre-stage circuit outputs a first and a second control signal, and controls a channel current of the first and the second output transistor. In a period in which one control signal causes the corresponding output transistor to operate in class AB mode, the other control signal places the corresponding output transistor in a cutoff state.