Patents by Inventor Montana T.C. Reid

Montana T.C. Reid 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).

  • Distortion correction in class-D amplifiers
    Patent number: 8773197
    Abstract: The present application describes an apparatus and method for reducing distortion in a class-D amplifier. The power output section of the amplifier is driven by an adjusted PWM signal, rather than by a PWM signal created directly from the input analog signal. A reference output, designed to closely track the input analog signal, is compared to the amplifier output. The resulting difference is an error signal which is inverted and summed with a second analog signal corresponding to the directly created PWM signal and changes the timing of the voltage transitions of the second analog signal. The changed voltage transitions are used to create the adjusted PWM signal. The inversion of the error signal causes negative feedback which results in the adjustment of the PWM signal being in a direction which reduces the error signal and thus the distortion of the amplifier.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: July 8, 2014
    Assignee: ESS Technology, Inc.
    Inventors: Dustin Dale Forman, Trevor Blake Lynch-Staunton, Montana T. C. Reid
  • Distortion Correction in Class-D Amplifiers
    Publication number: 20130241647
    Abstract: The present application describes an apparatus and method for reducing distortion in a class-D amplifier. The power output section of the amplifier is driven by an adjusted PWM signal, rather than by a PWM signal created directly from the input analog signal. A reference output, designed to closely track the input analog signal, is compared to the amplifier output. The resulting difference is an error signal which is inverted and summed with a second analog signal corresponding to the directly created PWM signal and changes the timing of the voltage transitions of the second analog signal. The changed voltage transitions are used to create the adjusted PWM signal. The inversion of the error signal causes negative feedback which results in the adjustment of the PWM signal being in a direction which reduces the error signal and thus the distortion of the amplifier.
    Type: Application
    Filed: November 21, 2012
    Publication date: September 19, 2013
    Applicant: ESS TECHNOLOGY, INC.
    Inventors: Dustin Dale Forman, Trevor Blake Lynch-Staunton, Montana T.C. Reid