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:
Feb. 17, 2009
Filed:
Dec. 19, 2006
Akira Nishino, Tokyo, JP;
Akira Nishino, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A gain variable circuit includes a first load between a first supply voltage and a first output terminal outputting a first output signal; a second load between the first supply voltage and a second output terminal outputting a second output signal with phase reversed from the first output signal; a first differential circuit between the first and second output terminals and a first node that changes gains of the first and second output signals based on first and second complementary gain variable signals; a second differential circuit between the first and second output terminals and a second node that changes gains of the first and second output signals based on the first and second gain variable signals; and an amplification circuit between the first and second nodes and a second supply voltage node that amplifies the first and second output signals based on first and second complementary input signals.