Patents by Inventor Shawn Michael Logan

Shawn Michael Logan 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).

  • Programmable linear trimming method and system for phase locked loop circuit calibration
    Patent number: 7714667
    Abstract: The present invention implements an apparatus for calibrating a phase locked loop (PLL) circuit. The apparatus includes a detector for detecting frequencies of a reference signal and a controlled oscillator contained in the PLL circuit. The detector outputs the frequency difference to a control circuit. The control circuit is programmed to adjust one or more control signals to the controlled oscillator based upon the frequency difference in an orderly fashion to complete the calibration process.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: May 11, 2010
    Assignee: Agere Systems Inc.
    Inventors: Xingdong Dai, Yasser Ahmed, Christopher J. Abel, Shawn Michael Logan
  • PROGRAMMABLE LINEAR TRIMMING METHOD AND SYSTEM FOR PHASE LOCKED LOOP CIRCUIT CALIBRATION
    Publication number: 20090115536
    Abstract: The present invention implements an apparatus for calibrating a phase locked loop (PLL) circuit. The apparatus includes a detector for detecting frequencies of a reference signal and a controlled oscillator contained in the PLL circuit. The detector outputs the frequency difference to a control circuit. The control circuit is programmed to adjust one or more control signals to the controlled oscillator based upon the frequency difference in an orderly fashion to complete the calibration process.
    Type: Application
    Filed: November 2, 2007
    Publication date: May 7, 2009
    Applicant: AGERE SYSTEMS INC.
    Inventors: Xingdong Dai, Yasser Ahmed, Christopher J. Abel, Shawn Michael Logan