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:
Oct. 27, 1992
Filed:
Sep. 27, 1991
Applicant:
Inventors:
John K Eitrheim, Garland, TX (US);
Mark Bluhm, Carrollton, TX (US);
Assignee:
Cyrix Corporation, Richardson, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307480 ; 307443 ; 307246 ; 307572 ; 307481 ;
Abstract
A bus precharge circuit is provided that precharges a bus line or node as an inverse function of the precharge level already attained on the bus line, such that the precharge level on the bus line is gradually approached. The precharge circuit charges the bus line to a midpoint between high and low logic states. The preexisting state of the bus line is stored and is used to select one of two voltage supplies to which the bus line may be partially pulled up or down. The switchpoint of a precharge circuit sensing gate is set to be equivalent to the switchpoint of the receiving gate of receiver on the bus line.