Patents by Inventor William James Smurthwaite

William James Smurthwaite 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).

  • Testing asynchronous circuits
    Patent number: 6246971
    Abstract: A method and system for testing a circuit. A test program is downloaded into the circuit, which causes the circuit to provide a serial test output pattern comprising a series of identical signals to indicate whether the circuit passes the test. Signals of the test output pattern are compared against corresponding signals of an expected test output pattern only for non-masked signals of the expected test output pattern, wherein the expected test output pattern is masked for a maximum tolerable time period around an expected test output pattern start time.
    Type: Grant
    Filed: January 5, 1999
    Date of Patent: June 12, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Bahram Ghaffarzadeh Kermani, William James Smurthwaite, James Frank Vomero