Patents by Inventor Claude J. J. Champagne

Claude J. J. Champagne 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).

  • Pulse code demodulator for frequency shift keyed data
    Patent number: 4378526
    Abstract: A demodulator which directly decodes Pulse Code Modulated Signals initially modulated by Frequency Shift Keyed Data by determining the period between zero crossings. The instant of the zero crossing between PCM signal samples is determined by interpolation from the magnitude of the samples immediately preceding and succeeding the zero crossing upon detection of a change in the sign bit of the PCM signal.
    Type: Grant
    Filed: September 25, 1980
    Date of Patent: March 29, 1983
    Assignee: Northern Telecom Limited
    Inventors: Claude J. J. Champagne, Ernst A. Munter