Patents by Inventor Roger Douglas

Roger Douglas 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).

  • Peak detection circuit and method
    Patent number: 9651933
    Abstract: A circuit is provided for detecting peaks of a sinusoidal input signal includes circuitry for generating first and second sinusoidal output signals that are out of phase with one another and with the sinusoidal input signal. A comparator block compares the sinusoidal output signals to determine instances where the amplitudes of the first and second sinusoidal output signals cross over each other. The sinusoidal output signals may lead the sinusoidal input signal somewhat so that, after taking into account processing delay, the indicated crossover instances substantially coincide with peaks in the sinusoidal input signal such that a trigger signal generated by the circuit accurately indicates the timing of the peaks.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: May 16, 2017
    Assignee: Magna E-Car Systems of America, Inc.
    Inventors: Thomas J. Wand, Roger Douglas
  • PEAK DETECTION CIRCUIT AND METHOD
    Publication number: 20150137728
    Abstract: A circuit is provided for detecting peaks of a sinusoidal input signal includes circuitry for generating first and second sinusoidal output signals that are out of phase with one another and with the sinusoidal input signal. A comparator block compares the sinusoidal output signals to determine instances where the amplitudes of the first and second sinusoidal output signals cross over each other. The sinusoidal output signals may lead the sinusoidal input signal somewhat so that, after taking into account processing delay, the indicated crossover instances substantially coincide with peaks in the sinusoidal input signal such that a trigger signal generated by the circuit accurately indicates the timing of the peaks.
    Type: Application
    Filed: December 19, 2012
    Publication date: May 21, 2015
    Applicant: Magna E-Car Systems of America, Inc.
    Inventors: Thomas J. Wand, Roger Douglas