Patents by Inventor James W. Friske

James W. Friske 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).

  • Muting circuit using common mode rejection of differential amplifier
    Patent number: 5208865
    Abstract: Differential signals are employed in a distributed audio system to improve noise immunity of the low level differential signals transmitted between a main unit and a power amplifier. The power amplifier may be in an auxiliary output unit which is locally muted by employing a field-effect transistor connected between the differential signals. When the field-effect transistor is turned on by a mute signal, the common mode rejection of the differential amplifier is employed to mute the amplifier output.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: May 4, 1993
    Assignee: Ford Motor Company
    Inventors: James W. Friske, Andrew C. Krochmal