Patents by Inventor Peter B. Cunningham

Peter B. Cunningham 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 determining the tuned frequency of a digital repeater
    Patent number: 4221939
    Abstract: An apparatus and method for determining the tuned frequency of a digital repeater (2) solely through the use of external connections. A pulse burst (30) at a preselected transmission frequency, produced by generator circuitry (4), is inserted into repeater (2) to cause the timing circuit of the same to oscillate for a predetermined time interval (25). After burst (30) and during interval (25), a plurality of sequential sampling pulses (26, 27) is fed to repeater (2) and regenerated by same. This format of burst (30) followed by sampling pulses (26, 27) is preferably repeated a number of times. Counter (10) measures the average time interval between the regenerated sampling pulses and determines the tuned frequency.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: September 9, 1980
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Peter B. Cunningham, James C. Smith