Patents by Inventor David B. Choate

David B. Choate 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 measurement receiver with means to resolve two folding frequencies of complex signals
    Patent number: 5323103
    Abstract: This is an arrangement to find two folding frequencies that fold into one frequency bin, which will save hardware. The input frequency in down converted into I and Q channels. Each channel requires one pair (two) of A/D converters. A total of three pairs of A/D converters are required. All three pairs of A/D converters have the SAME sampling frequency f.sub.s. There is a time delay of .tau. before the second pair of A/D converters, and 2.tau. before the third pair. At the outputs of the A/D converters FFT units followed by a signal processor are used to find the input frequencies by solving non-linear simultaneous equations.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: June 21, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: David B. Choate, James B. Y. Tsui