Patents by Inventor Don R. Holcomb, Sr.

Don R. Holcomb, Sr. 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).

  • Fine tuning frequency synthesizer with feedback loop for frequency control systems
    Patent number: 4977613
    Abstract: An additional mixer is included in the feedback loop of a PLL which can be one of the local oscillators of a dual conversion system. A fine tuning frequency synthesizer is coupled to an input of the additional mixer for providing fine frequency control of the PLL. The fine tuning frequency synthesizer can include an additional phase locked loop. Also, a feedback signal for suppressing noise created by another local oscillator can also be applied to the additional mixer.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: December 11, 1990
    Assignee: Motorola, Inc.
    Inventors: Don R. Holcomb, Sr., Mark J. Brown, Lawrence R. Schumacher