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. 25, 1989
Filed:
Oct. 09, 1986
Takashi Yamaguchi, Tokyo, JP;
Yasuo Kobayashi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A differential amplifier circuit comprising first and second input lines to which potentials with a slight difference therebetween are to be applied, a series combination of a first load transistor and a first amplifier transistor provided between sources of voltage of high and low levels, a series combination of a second load transistor and a second amplifier transistor provided between the sources of the voltages of high and low levels, and activating means provided in association with the first and second amplifier transistors for activating each of the first and second amplifier transistors when the activating means is actuated, each of the first and second load transistors, the first and second amplifier transistors and the activating transistor having a control terminal, the control terminal of the first amplifier transistor being connected to the first input line and the control terminal of the second amplifier transistor being connected to the second input line, characterized by current cutoff means provided in association with the first and second load transistors and responsive to the potentials applied to the first and second input lines, the current cutoff means being operative to electrically isolate one of the first and second amplifier transistors from the source of the voltage of high level in response to variation in the voltage on one of the first and second input lines.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile