Patents by Inventor Edward W. MacRobbie

Edward W. MacRobbie 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).

  • Offset cancellation for differential amplifiers
    Patent number: 5631603
    Abstract: A differential amplifier with improved offset cancellation is disclosed. The differential amplifier has a floating current source coupled to the drain terminals of the differential pair for providing complementary currents to cancel the offset voltage. In this way, the tail current in the differential pair is not affected by the offset cancellation and remains constant, while the common-mode offset is not worsened by the injected current.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: May 20, 1997
    Assignee: Rockwell International Corporation
    Inventors: Frederic M. Stubbe, Edward W. MacRobbie, Daryush Shamlou