Patents by Inventor Karl C. Stambaugh

Karl C. Stambaugh 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).

  • Method and apparatus for a sweep oscillator
    Patent number: 5225794
    Abstract: A method and apparatus for a sweep oscillator and a spectrum analyzer containing the sweep oscillator having a precisely determined center frequency includes a sweep circuit having a sawtooth waveform, a reference oscillator, a microprocessor controller and a modified phase-locked loop. The modified phase-locked loop further includes a control signal summer, a voltage controlled oscillator coupled to the control signal summer, a sweep oscillator output, and a sample and hold circuit including a switching circuit.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: July 6, 1993
    Assignee: Motorola, Inc.
    Inventors: Robert J. Skalka, Mark J. Brown, Karl C. Stambaugh