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:
Mar. 17, 2009
Filed:
Aug. 28, 2006
Hirofumi Saito, Kanagawa, JP;
Hirofumi Saito, Kanagawa, JP;
NEC Electronics Corporation, Kawasaki, Kanagawa, JP;
Abstract
A differential amplifier circuit in which an input offset voltage is very small. The differential amplifier circuit includes an input-stage differential amplifier section and a cascode-connected single-ended output section connected to the input-stage differential amplifier section. The input-stage differential amplifier section has a folded-cascode-connection. An inverted signal and non-inverted signal on the input side and output side, respectively, of the input-stage differential amplifier section are switched alternatingly in time-shared fashion by switches that are operated by two chopping clock signals of opposite phase.