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:
Jan. 22, 1980
Filed:
Apr. 03, 1978
Arthur J Leidich, Flemington, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
A voltage comparator comprising first and second transistors of a first conductivity type receiving a current at an interconnection of their emitter electrodes has the collector of the first transistor connected to the base of a third transistor of a second conductivity type complementary to the first. Reference and bias potentials are applied respectively to the emitter of the third transistor and to the base of the second transistor; and input signal voltages to be compared to the bias potential are applied to the base of the first transistor. Input voltage swings to the reference potential are prevented from depriving the first transistor of sufficient collector potential to support flow of current from its collector to the base of the third transistor. This is done by inserting resistance between the source of input voltage and the base of the first transistor.