Patents by Inventor Jean B. Verdier

Jean B. Verdier 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).

  • Patent number: 5345123
    Abstract: An attenuator circuit uses single point control to adjust the attenuation levels between first and second nodes. The attenuator is set-up as a .pi.-network with a pass transistor and first and second shunt transistors. Capacitors are coupled in the drain and source conduction paths of the first and second shunt transistors for DC isolation to float the shunt transistors. A control voltage applied at the drain of the pass transistor and the gates of the first and second shunt transistors controls the attenuation level. A parallel resistor and capacitor combination at the drain of the first shunt transistor provides tuning to match the input impedance of the attenuator to the sourcing circuit.
    Type: Grant
    Filed: July 7, 1993
    Date of Patent: September 6, 1994
    Assignee: Motorola, Inc.
    Inventors: Joseph Staudinger, John M. Golio, William B. Beckwith, Jean B. Verdier