Patents by Inventor Howard C. Yang

Howard C. Yang 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).

  • Frequency synthesizer with adaptive loop bandwidth
    Patent number: 5631587
    Abstract: A method for a frequency synthesizer with adaptive loop bandwidth is disclosed, which is adjusted by the improved frequency synthesizer includes a phase-locked loop and a phase-locked loop adjustment circuit. The phase-locked loop has loop characteristics including a loop bandwidth, a natural frequency, a damping factor, and the like. The phase-locked loop adjustment circuit is adjusted in response to a change in output frequency.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: May 20, 1997
    Assignee: Pericom Semiconductor Corporation
    Inventors: Ramon S. Co, Howard C. Yang
  • Current-steering CMOS logic family
    Patent number: 5162674
    Abstract: In integrated circuitry having both analog and digital circuits fabricated on the same substrate, switching transients produced by the digital circuitry can propagate through the substrate and induce deleterious effects in the associated analog circuitry. Such switching transients are greatly minimized by the disclosed family of CMOS logic circuits in which a constant DC bias current is steered to change logic states.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: November 10, 1992
    Assignee: State of Oregon Acting by and Through the State Board of Higher Education on Behalf of Oregon State University
    Inventors: David J. Allstot, Guojin Liang, Howard C. Yang