Patents by Inventor David N. Grantham

David N. Grantham 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).

  • Phase locked loop frequency source having reduced load pull
    Patent number: 6157262
    Abstract: A phase locked loop frequency source with greatly reduced load pull susceptibility is achieved by using a voltage controlled oscillator of frequency which is neither the same as nor a harmonic or sub-harmonic of the desired output frequency, which is derived by non-integer multiplication from the voltage controlled oscillator frequency.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: December 5, 2000
    Assignee: Honeywell International Inc.
    Inventors: John F. Fienhage, David N. Grantham, Mark A. Kolber