Patents by Inventor Derwin H. Bell

Derwin H. Bell 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).

  • Method and apparatus for synchronizing a signal to a time base
    Patent number: 4788697
    Abstract: Automatic selection of the rate at which a periodic signal is sampled to obtain a selected number of samples thereof within a predetermined interval is accomplished by first selecting the number of samples to be taken. The periodic signal is then sampled at an arbitrary rate, with the sampling being synchronized to the period of the signal. The number of samples obtained by sampling at the arbitrary rate is counted and compared to the chosen number of samples. If the counted number of samples is unequal to the chosen number of samples, then the arbitrary sampling rate is adjusted. The steps of sampling the signal, counting the number of samples, comparing the counted number to the chosen number of samples, and adjusting the arbitrary sampling rate are repeated until the counted number of samples equals the chosen number of samples, whereupon the adjusted arbitrary sampling rate becomes the selected sampling rate.
    Type: Grant
    Filed: January 2, 1987
    Date of Patent: November 29, 1988
    Assignee: American Telephone & Telegraph Company
    Inventors: Derwin H. Bell, Chauncey Herring, Jr., Jose M. Miranda