Patents by Inventor Gregory L. Horvath

Gregory L. Horvath 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).

  • Zero phase shift active microwave oscillators with resistive feedback in field effect transistor amplifiers
    Patent number: 4799028
    Abstract: A microwave oscillator in a loop configuration comprises three substantially identical amplifier stages each having its own phase shift at a selected oscillating frequency. A transmission delay element having a phase shift at the selected oscillating frequency, is also in the loop configuration, so that the oscillator has zero phase shift around the loop at the oscillating frequency. Each amplifier stage has at least one active component with resistive feedback, which is connected to DC blocking and filtering capacitors. Capacitor values between 2.2 and 5.1 pf are used making the oscillator design amenable to cost effective conventional hybrid and semiconductor processes.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: January 17, 1989
    Assignee: Hughes Aircraft Company
    Inventors: Gary R. Weaver, Bryce M. Smith, Gregory L. Horvath, Bernard L. Walsh, Jr.