Patents by Inventor Charles L. Buddecke

Charles L. Buddecke 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).

  • Inherently flat spectral density pseudorandom noise generator
    Patent number: 4697157
    Abstract: A pseudorandom noise generator (10) is disclosed which includes a maximum length sequence generator (13) for providing a digital signal having a pseudorandom sequence, modulating circuitry (17,20, 25, 27, 33) responsive to the digital signal for providing a constantly changing modulation signal which changes linearly. In one embodiment, the modulation circuitry provides a sequence of linear ramps which remain within predetermined limits, and a voltage controlled oscillator (29) responsive to the modulation signal for providing a pseudorandom noise output VCOUT. The modulating circuitry causes inversion of the slope of the ramps when they reach the predetermined limits.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: September 29, 1987
    Assignee: Hughes Aircraft Company
    Inventors: Charles L. Buddecke, Robert F. Graham, Jr.