Patents by Inventor Joseph E. Andrews, Jr.

Joseph E. Andrews, Jr. 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).

  • Ultra linear frequency discriminator circuitry
    Patent number: 4525675
    Abstract: Signals to be discriminated are supplied through a controllable attenuator and power splitter to first and second discriminators with response slopes which are equal and of opposite sign. The outputs of the discriminators are summed and a reference signal is subtracted from the sum to produce a control signal which adjusts the input attenuator to maintain the amplitude of the input signal constant. The outputs of the discriminators are also subtracted to provide an output signal which is a linear function of frequency and independent of input amplitude.
    Type: Grant
    Filed: April 7, 1983
    Date of Patent: June 25, 1985
    Assignee: Motorola, Inc.
    Inventors: Carl T. Richmond, Thomas A. Butler, Joseph E. Andrews, Jr.