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:
Jun. 28, 2005
Filed:
Aug. 22, 2003
Phillip L. Corson, Westford, VT (US);
Harold Pilo, Underhill, VT (US);
Phillip L. Corson, Westford, VT (US);
Harold Pilo, Underhill, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed is a method and structure that controls an output driver by generating an output data path clock signal from a system clock signal and timing the programmable impedance of the output driver according to the output data path clock signal. The method/structure controls the timing of the line driver circuits according to the output data path clock signal. By timing the programmable impedance according to the output data path clock signal, the timing of delivery of an impedance control signal is coordinated with the timing of delivery of data. The method/structure also performs impedance updates on the output driver more frequently during initialization cycles than in cycles that occur after the initialization cycles expire using at least two differently timed clock dividers and a counter.