Patents by Inventor Louis Michael Nigra

Louis Michael Nigra 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).

  • Rapid tuning, low distortion digital direct modulation phase locked loop and method therefor
    Patent number: 6157271
    Abstract: A direct modulation phase lock loop (PLL) a voltage controlled oscillator (VCO) (114). A divider (118) has a first divider input coupled to the VCO and a second divider input to receive a modulation inducing divisor sequence. A phase detector (102) has a first detector input coupled to the divider to receive the output thereof, and a second detector input to receive a reference input. A tuning circuit (306, 406) is coupled to the phase detector and the VCO, the tuning circuit responsive to a variable DC reference potential such that the tuning circuit has a frequency response that is constant over the modulation bandwidth whereby the PLL is a type 1 PLL with low modulation distortion.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: December 5, 2000
    Assignee: Motorola, Inc.
    Inventors: Gregory Redmond Black, Louis Michael Nigra, Michael Edward Denzin