Patents by Inventor John H. Weidman

John H. Weidman 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).

  • Bandpass filter utilizing capacitively coupled stepped impedance resonators
    Patent number: 5144268
    Abstract: A bandpass filter which lends itself to applications in the 500 megahertz to 1 gigahertz region. The filter utillizes the capacitively coupled bandpass filter as a model in the design process, but replaces the lumped element inductor/capacitor resonators with distributed stepped impedance resonators.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: September 1, 1992
    Assignee: Motorola, Inc.
    Inventor: John H. Weidman
  • Single fault/tolerant MMIC switches
    Patent number: 5061911
    Abstract: A single fault/tolerant monolithic microwave integrated circuit field effect transistor switching arrangement. This circuitry provides for the high speed (up to 18 GHz) switching of RF input signals while maintaining a circuit which is single fault/tolerant. That is, a single FET within the circuit may become faulty and the operation of the switching arrangement remains unaltered. The circuitry also provides for a self-terminating feature inherent in this FET switch.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: October 29, 1991
    Assignee: Motorola, Inc.
    Inventors: John H. Weidman, Glenn Yoshiyama