Patents by Inventor David S. Rothery

David S. Rothery 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).

  • Code correlation arrangement
    Patent number: 4910695
    Abstract: A code correlation arrangement comprising clock means for sampling (11) an analogue input signal, means for generating a digital code sequence (14), means for clocking (15) the code generating means synchronously with the sampling of the analogue input signal, means for digitally multiplying (12) the code sequence with the sampled analogue signal, means for digitally filtering (13) the output of the multiplying means, and means for controlling the clock phase of the code generating means to maintain phase tracking of an incoming code phase in the analogue signal by the code generating means.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: March 20, 1990
    Assignee: STC PLC
    Inventors: Simon J. Gale, David S. Rothery