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:
May. 30, 2000
Filed:
Jun. 11, 1997
Danny Marvin Neal, Round Rock, TX (US);
Charles Bertram Perkins, Jr, Cedar Park, TX (US);
Richard Allen Kelley, Apex, NC (US);
Paul Lee Clouser, Stamford, CT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system of supporting differential signalling circuitry in an enhanced PCI bus within a data processing system is disclosed The enhanced PCI bus comprises a plurality of differential signal conductor pairs. A system and method in accordance with the present invention comprises a system for providing each of the plurality of differential signal pairs over a first line and a second line, the first line having a front end and a back end, the second line having a front end and a back end. The system and method includes a differential driver for driving the first line and the second line with a small voltage change of equal amounts in opposite direction to change logic states, a receiver for sensing a voltage change between the first line and the second line and a termination network coupled to the first line and second line for terminating the first line and the second line. According to the system and method disclosed herein, the present invention provides for higher frequency capability and lower noise to signal ratio, thereby allowing the enhenced PCI bus to be compatible with a legacy PCI bus.