Patents by Inventor William S. Check, Jr.

William S. Check, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for embedding a sub-channel in a block coded data stream
    Patent number: 7345992
    Abstract: The present invention relates in general to a method, apparatus, and article of manufacture for providing high-speed digital communications through a communications channel. In one aspect, the present invention employs a variable rate back channel, incorporated within an existing communication that does not increase or adversely impact the transmission rate of data on the communication channel.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: March 18, 2008
    Assignee: Synopsys, Inc.
    Inventors: James Gorecki, John T. Stonick, Shawn Searles, William S. Check, Jr., Robert B. Lefferts
  • Method and apparatus for encoding and decoding digital communications data
    Patent number: 7260155
    Abstract: In one aspect, the present invention is a system and technique that provides for the systematic development or implementation of codes that increase the robustness of systems employing, for example, PAM-n transmission techniques. The system and technique of this aspect of the invention eliminate, minimize, reduce or limit transitions between extreme signaling levels. As a result, the slew rate employed and/or required by the transmitter may reduce crosstalk and intersymbol interference, and provide for wider “eye” openings from the perspective of the receiver.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: August 21, 2007
    Assignee: Synopsys, Inc.
    Inventors: John T. Stonick, James Gorecki, William S. Check, Jr., Shawn Searles
  • System and method for embedding a sub-channel in a block coded data stream
    Patent number: 7158575
    Abstract: The present invention relates in general to a method, apparatus, and article of manufacture for providing high-speed digital communications through a communications channel. In one aspect, the present invention employs a variable rate back channel, incorporated within an existing communication that does not increase or adversely impact the transmission rate of data on the communication channel.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: January 2, 2007
    Assignee: Synopsys, Inc.
    Inventors: James Gorecki, John T. Stonick, Shawn Searles, William S. Check, Jr., Robert B. Lefferts