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:
Apr. 11, 1995
Filed:
Dec. 03, 1993
Masanobu Arai, Tokyo, JP;
Noriaki Edasawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A push-pull-type amplifier circuit has three current mirror circuits CM1, CM2, CM3 and transistors M6, M7 connected between a reference current supply I.sub.R and output transistors M2, M3 for controlling an idling current flowing through the output transistors M2, M3 so as to be proportional to a current flowing through the reference current supply I.sub.R so that the idling current will be stabilized irrespective of variations in a power supply voltage. An operational amplifier which incorporates the push-pull-type amplifier circuit as an output stage circuit is highly stable in operation, and can be designed in a simple arrangement without having to take into account power supply voltage variations.