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. 20, 1989
Filed:
Jan. 06, 1988
Applicant:
Inventors:
Takahiro Sugiyama, Tokyo, JP;
Mitsutoshi Sugawara, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06G / ; H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307494 ; 307497 ; 307477 ; 307542 ; 307544 ; 307362 ; 328115 ; 328146 ;
Abstract
An improved comparator circuit which can operate stably against noise or fluctuation in a power supply is disclosed. The comparator circuit includes a differential amplifier having first and second input terminal, a first diode for biasing the first input terminal at a constant voltage, a second diode coupled between the first and second input terminals, and means for gradually changing the potential at the first input terminal towards the above constant voltage.