Patents by Inventor Brian Robert Kessler

Brian Robert Kessler 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).

  • Process for identifying defective interconnection net end points in boundary scan testable circuit devices
    Patent number: 5691991
    Abstract: A process for diagnosing test result data produced during boundary scan testing of a circuit device having a plurality of boundary scan latches at endpoints interconnected in a plurality of nets. The process identifies the particular endpoint that is defective out of all the endpoints in a defective net so that a repair can be efficiently directed to the identified endpoint. The process looks for recognizable patterns of failures in failure data resulting from each test pattern in a boundary scan test, particularly the symptom pattern of a failed endpoint that fails to drive all other endpoints on the net when acting as a driver and fails to receive data from all other endpoints when acting as a receiver.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: November 25, 1997
    Assignee: International Business Machines Corporation
    Inventors: Brian Robert Kessler, Edward Everett Horton, III