Patents by Inventor Douglas T. Massey

Douglas T. Massey 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).

  • Simulation testing of digital logic circuit designs
    Patent number: 7251794
    Abstract: A method and system for testing a circuit design. The method including generating a simulation model of the circuit design, the circuit design comprising one or more source latches, one or more destination latches and a logic function connected between the source latches and the destination latches; generating a modified simulation model of the simulation model by inserting random skew between an output of each source latch and an input of the logic function only in asynchronous data paths between the source latches and the destination latches of the simulation model; and running the modified simulation model.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: July 31, 2007
    Assignee: International Business Machines Corporation
    Inventors: Rafael Blanco, Suzanne Granato, Francis A. Kampf, Douglas T. Massey