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:
Mar. 22, 1994
Filed:
Nov. 27, 1991
Kazuhisa Miyamoto, Ohme, JP;
Mitsugu Kusunoki, Ohme, JP;
Masanori Odaka, Kodaira, JP;
Mitsuo Usami, Akishima, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Herein disclosed is a logic circuit which has an input bipolar transistor for receiving an input signal at its base; variable impedance circuit having at least a first P-channel MOSFET connected between a first supply voltage and the collector of the input bipolar transistor; a second N-channel MOSFET connected between the emitter of the input bipolar transistor and a second supply voltage; an output bipolar transistor connected between the first supply voltage and the output terminal of the circuit for receiving the collector potential of the input bipolar transistor at its base; and a third, pull-down MOSFET connected between the output terminal and the second or third supply voltage.