Patents by Inventor Darwin H. Throne

Darwin H. Throne 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).

  • Single sampler heterodyne method for wideband frequency measurement
    Patent number: 4135243
    Abstract: An input signal of unknown frequency is applied to a sampler which is driven by a sampling signal of frequency f.sub.O to produce an intermediate signal of frequency f.sub.IF. The sampling frequency f.sub.O varies in response to a randomly, or pseudo-randomly varying signal which in turn causes the signal of frequency f.sub.IF to also vary. f.sub.IF will vary in the same way as f.sub.O, but with a scale factor of .+-. N, where N is the harmonic number. Correlation techniques are used to determine the harmonic number and the sideband to enable calculation of the input frequency. Errors in the determination of the harmonic number and sideband due to frequency modulation of the input signal are reduced, due to the variation imposed on the sampling frequency f.sub.O.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: January 16, 1979
    Assignee: Hewlett-Packard Company
    Inventors: Luiz Peregrino, Darwin H. Throne