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:
Jul. 24, 2007
Filed:
Jul. 20, 2000
Michael R. Arneson, Chippewa Falls, WI (US);
Terrance L. Bowman, Sumner, WA (US);
Frank N. Cornett, Chippewa Falls, WI (US);
John F. Deryckere, Eau Claire, WI (US);
Brian T. Hillert, Chippewa Falls, WI (US);
Philip N. Jenkins, Eau Claire, WI (US);
Nan MA, Chippewa Falls, WI (US);
Joseph M. Placek, Chippewa Falls, WI (US);
Rodney Ruesch, Eau Claire, WI (US);
Gregory M. Thorson, Altoona, WI (US);
Michael R. Arneson, Chippewa Falls, WI (US);
Terrance L. Bowman, Sumner, WA (US);
Frank N. Cornett, Chippewa Falls, WI (US);
John F. DeRyckere, Eau Claire, WI (US);
Brian T. Hillert, Chippewa Falls, WI (US);
Philip N. Jenkins, Eau Claire, WI (US);
Nan Ma, Chippewa Falls, WI (US);
Joseph M. Placek, Chippewa Falls, WI (US);
Rodney Ruesch, Eau Claire, WI (US);
Gregory M. Thorson, Altoona, WI (US);
Silicon Graphics, Inc., Sunnyvale, CA (US);
Abstract
The present invention is directed toward a communications channel comprising a link level protocol, a driver, a receiver, and a canceller/equalizer. The link level protocol provides logic for DC-free signal encoding and recovery as well as supporting many features including CRC error detection and message resend to accommodate infrequent bit errors across the medium. The canceller/equalizer provides equalization for destabilized data signals and also provides simultaneous bi-directional data transfer. The receiver provides bit deskewing by removing synchronization error, or skewing, between data signals. The driver provides impedance controlling by monitoring the characteristics of the communications medium, like voltage or temperature, and providing a matching output impedance in the signal driver so that fewer distortions occur while the data travels across the communications medium.