Patents by Inventor John C. Pescatore, Jr.

John C. Pescatore, Jr. 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).

  • Validating the synchronization of lock step operated circuits
    Patent number: 5604754
    Abstract: Apparatus for and methods of detecting an error in multiple state lock step operated circuits. Signatures representing internal states of each circuit are conveyed in daisy chain format to connect successive circuits. Local comparisons between the received signatures and those representing previous internal states are used to detect mismatches between states. Signals indicating the detection of a mismatch appear on a commonly connected error line. Scanned comparison of the circuits to determine those having detected a mismatch allows the error source to be identified.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: February 18, 1997
    Assignee: International Business Machines Corporation
    Inventors: Randall C. Itskin, John C. Pescatore, Jr., David B. Ruth