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:
Jun. 07, 2011
Filed:
May. 27, 2010
Kimihiro Nakao, Miyagi-Ken, JP;
Kimihiro Nakao, Miyagi-Ken, JP;
ALPS Electric Co., Ltd., Tokyo, JP;
Abstract
An operational amplification circuit includes a differential amplification circuit portion that amplifies a differential input, and an output circuit portion that outputs the amplified output using a signal amplified in the differential amplification circuit portion. The differential amplification circuit portion is provided with a pair of first transistors to which signals are differentially input, and second and third transistors which are connected to current paths of the pair of first transistors and which constitute current mirror circuits with respect to each other. The output circuit portion is provided with a fourth transistor, a gate of which is connected to a drain of the second transistor, and an amplified output is output from a drain of the fourth transistor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile