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:
Jul. 16, 1985
Filed:
Jun. 15, 1981
Yuen H Chan, Wappingers Falls, NY (US);
James E Dickerson, Hopewell Junction, NY (US);
Walter S Klara, Hopewell Junction, NY (US);
Theodore W Kwap, Brewster, NY (US);
Joseph M Mosley, Hopewell Junction, NY (US);
IBM Corporation, Hopewell Junction, NY (US);
Abstract
Disclosed is a means for enhancing logic circuit performance and more particularly, for enhancing the switching speeds of a variety of logic circuits. What is involved is the insertion of a so called 'snap' or enhancement transistor connected to a common node defining an output of a basic logic circuit. In one example, the emitter of this 'snap' transistor is connected to an output node in the circuit, which in conventional practice would be charged during an upgoing transition by a fixed RC time constant. In accordance with the present improvement, however, the 'snap' transistor, due to charge stored therein, remains conducting--although the associated logic device is turned off. This current discharges as reverse base current and the output provides what appears to be an inductive voltage spike. The effect is that a temporary source of current is available to charge the common node. As a result, the transition time involved in going from one voltage level to another at the output node is substantially reduced.