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. 23, 1992
Filed:
Oct. 30, 1990
Toru Nakamura, Kushikino, JP;
Toshiyuki Koreeda, Sendai, JP;
Fujitsu Limited, Kanagawa, JP;
Kyushu Fujitsu Electronics Limited, Kagoshima, JP;
Abstract
A Bi-CMOS circuit according to the present invention includes a first transistor made from an N-channel MOS transistor that is turned on and off in response to the logic state of an input signal and that supplies a first current to the base of an output transistor when the first transistor is turned on, and an active pull-down current supplying means connected to the gate electrode of the first transistor. The active pull-down current supplying means provides a second current, which is an active pull-down current, to the base of the output transistor so that the first and second currents can be supplied to the base of the output transistor.