Patents by Inventor Sonny Yeoh

Sonny Yeoh 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).

  • Dynamic memory clock adjustments
    Patent number: 7657775
    Abstract: Methods, circuits, and apparatus for changing a frequency of a clock signal provided to a graphics memory while reducing any resulting visual glitch or disturbance on a monitor. A specific embodiment provides multiple clock sources that may be multiplexed or selected to provide a memory clock signal to the graphics memory. The multiplexer switches from providing a first clock source signal as the memory clock signal to providing a second clock source signal as the memory clock signal. The first clock source changes its frequency of operation. After the first clock source settles or stabilizes, the multiplexer switches back to providing the first clock source signal as the memory clock signal.
    Type: Grant
    Filed: November 22, 2007
    Date of Patent: February 2, 2010
    Assignee: NVIDIA Corporation
    Inventors: Barry Wagner, Jonah M. Alben, Sonny Yeoh, Jeffrey J. Irwin, Saurabh Gupta
  • Method of providing a second clock while changing a first supplied clock frequency then supplying the changed first clock
    Patent number: 7315957
    Abstract: Methods, circuits, and apparatus for changing a frequency of a clock signal provided to a graphics memory while reducing any resulting visual glitch or disturbance on a monitor. A specific embodiment provides multiple clock sources that may be multiplexed or selected to provide a memory clock signal to the graphics memory. The multiplexer switches from providing a first clock source signal as the memory clock signal to providing a second clock source signal as the memory clock signal. The first clock source changes its frequency of operation. After the first clock source settles or stabilizes, the multiplexer switches back to providing the first clock source signal as the memory clock signal.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: January 1, 2008
    Assignee: NVIDIA Corporation
    Inventors: Barry Wagner, Jonah M. Alben, Sonny Yeoh, Jeffrey J. Irwin, Saurabh Gupta