Patents by Inventor Alice I. Biber

Alice I. Biber 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: 5134311
    Abstract: A self-adjusting impedance matching driver for a digital circuit. The driver has both a pull-up gate to VDD and a pull-down gate to ground. An array of gates is provided in parallel with each of the pull-up gate and the pull-down gate, with any one or more of such gates being selectively enabled in response to circuit means that monitors the impedance match between the output of the driver and the network it drives. By enabling selectively such gates, any impedance mismatch can be minimized. The selective enablement may be done only at power up, and thereafter only if the driven network is changed substantially.
    Type: Grant
    Filed: June 7, 1990
    Date of Patent: July 28, 1992
    Assignee: International Business Machines Corporation
    Inventors: Alice I. Biber, Douglas W. Stout