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:
Dec. 17, 1991
Filed:
Apr. 23, 1990
Applicant:
Inventor:
Charles R Hoffman, Raleigh, NC (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307480 ; 307262 ; 307269 ; 307475 ; 328 75 ; 328155 ;
Abstract
Described is a circuit arrangement for controlling peak transient current on data buses of VLSI chips. The circuit arrangement includes a phase lock loop (PLL) with a voltage control oscillator (VCO) made up of high speed inverter circuits that generate very short time interval pulses that are used to control the switching sequence of drivers onto the buses. As a result, the transients are distributed over a relatively short time interval and data throughput on the buses is not adversely affected.