Patents by Inventor Kenelm G. Murray

Kenelm G. Murray 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).

  • Architecture for programmable on-chip termination
    Patent number: 6826734
    Abstract: The present invention provides a programmable on-chip resistance. An apparatus of the present invention may utilize an analog scheme and adjusts the termination resistance in real-time. One way of implementing the invention is the use of a single transistor with analog control that may vary the resistance for differential input ports. This may provide a reduction in parasitic capacitance as viewed by a high-speed driver while reducing the requirement of over-driving the gate to reduce the impedance of the transistor.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: November 30, 2004
    Assignee: Cypress Semiconductor Corp.
    Inventor: Kenelm G. Murray
  • Programmable on-chip termination device
    Patent number: 6710618
    Abstract: The present invention is a method and apparatus for producing a programmable on-chip resistance. A programmable on-chip resistance is maintained to provide a constant resistance for differential input common mode voltage changes and may provide a constant resistance over changes in an amplitude of an input differential swing. The programmable on-chip resistance may be implemented through a single transistor in which a control voltage for altering the resistance of the transistor is produced by the use of an intermediate termination device. The intermediate termination device may replicate the programmable on-chip termination device to ensure proper adjustment of the on-chip termination device to maintain a constant resistance.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: March 23, 2004
    Assignee: Cypress Semiconductor Corp.
    Inventor: Kenelm G. Murray