Patents by Inventor John R. Sonnenberg

John R. Sonnenberg 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).

  • Frequency synthesizer modulation response linearization
    Patent number: 4649353
    Abstract: In accordance with the present invention, there is provided a method of substantially flattening the modulation response in a frequency synthesizer. The method includes the steps of generating a synthesized frequency in response to a filtered control signal; scaling the synthesized frequency with a scalar; generating a control signal, having a response substantially the reciprocal of the frequency generation response, and indicative of the phase relationship between a reference frequency and the scaled, synthesized frequency; and filtering the control signal, whereby the interaction of the phase relationship control signal response and the frequency generation response approximates a flat modulation response.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: March 10, 1987
    Assignee: Motorola, Inc.
    Inventor: John R. Sonnenberg