Patents by Inventor David R. Weitzel

David R. Weitzel 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).

  • Push-pull driver without input saturation or output leakage
    Patent number: 5132562
    Abstract: A bipolar push-pull driver in which the input transistor is biased so that it does not saturate and the base of its associated output transistor is pulled down to shut off compeletely by a transistor switch controlled by the complimentary output of the other input transistor.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: July 21, 1992
    Assignee: International Business Machines Corporation
    Inventors: Francis Chan, George J. English, Bijan Salimi, David R. Weitzel