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:
Aug. 30, 1994
Filed:
Apr. 27, 1992
Sang H Dhong, Mahopac, NY (US);
Hyun J Shin, Mahopac, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
High speed, low power signal switching logic implementable in bipolar or BiCMOS technology is described. Signal switching is between a first prescribed state and a second prescribed state and is accomplished using a conventional active signal pull-up circuit in combination with a novel self-biased, feedback-controlled active signal pull-down circuit. The active signal pull-down circuit is driven by a feedback signal obtained from the active pull-up circuitry such that only a single input connection to the signal switching circuit is required. Preferably, the active signal pull-up circuit comprises an emitter follower coupled transistor and the drive signal for the active signal pull-down circuit is taken from the collector thereof via a dc-coupling level shifter. Various signal switching circuit embodiments are described.