Patents by Inventor Guy Marian Humphrey

Guy Marian Humphrey 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).

  • Circuit and method for compensation if high-frequency signal loss on a transmission line
    Patent number: 6759868
    Abstract: A circuit and method that maintains the impedance matching characteristics of a common output driver while compensating for the high-frequency signal attenuation inherent in printed circuit board traces and other integrated circuit signal transmission media are disclosed. The circuit includes a pre-emphasis driver configured in parallel with a standard output driver. The pre-emphasis driver is a tri-statable device which mirrors a received logic input when in an “on” state and provides a high output impedance with no signal content when in an “off” state. The pre-emphasis driver is controlled by a pre-emphasis control signal configured such that the pre-emphasis driver can inject high-frequency signal components into a transmission line for a portion of a clock cycle.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: July 6, 2004
    Assignee: Agilent Technologies, Inc.
    Inventors: Christopher G. Helt, Guy Marian Humphrey
  • Circuit and method for compensation if high-frequency signal loss on a transmission line
    Publication number: 20020118042
    Abstract: A circuit and method that maintains the impedance matching characteristics of a common output driver while compensating for the high-frequency signal attenuation inherent in printed circuit board traces and other integrated circuit signal transmission media are disclosed. The circuit includes a pre-emphasis driver configured in parallel with a standard output driver. The pre-emphasis driver is a tri-statable device which mirrors a received logic input when in an “on” state and provides a high output impedance with no signal content when in an “off” state. The pre-emphasis driver is controlled by a pre-emphasis control signal configured such that the pre-emphasis driver can inject high-frequency signal components into a transmission line for a portion of a clock cycle.
    Type: Application
    Filed: February 27, 2001
    Publication date: August 29, 2002
    Inventors: Christopher G. Helt, Guy Marian Humphrey