Patents by Inventor John James Shushereba

John James Shushereba 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).

  • Weighted random pattern built-in self-test
    Patent number: 5983380
    Abstract: An integrated circuit comprising logic circuits and self-test circuits for testing logic circuits including a pseudo random pattern generator for generating at least one pseudo random pattern and weighing circuit for weighing the pseudo random pattern. The weighting circuit and pseudo random pattern generator generate a plurality of weighted pseudo random patterns including at least one pair of a first weighted pseudo random pattern and a second weighted pseudo random pattern that is the complement of the first pattern. A weighting instruction selects one of the first or second pseudo random patterns for testing the logic circuits.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: November 9, 1999
    Assignee: International Business Machines Corporation
    Inventors: Franco Motika, Stephen V. Pateras, John James Shushereba