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. 01, 1994
Filed:
Aug. 31, 1992
Jeffrey T Bridges, Austin, TX (US);
Jeffrey E Maguire, Austin, TX (US);
Paul C Rossbach, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A precharge device (28) has a first (30) and a second node (32), a transistor tree (29), a screening transistor (Q20) and clocking circuitry (Q17, Q18, Q19). The transistor tree (29) couples the first (30) and the second (32) node and is operable to electrically short-circuit the nodes according to input signals (A.sub.1, A.sub.2, A.sub.3). The screening transistor (Q20) has a first and a second [source-drain region] current electrode and a [gate] control electrode. The first [source-drain region] current electrode is coupled to a third node (34), the second [source-drain region] current electrode is coupled to the second node (32) and the [gate] control electrode is coupled to the first node (30). The clocking circuitry alternately precharges the first (30) and third nodes (34) to a first known voltage level and evaluates the voltage on the first node (30) to output a logic level.