Patents by Inventor Daniel Charles Pickens

Daniel Charles Pickens 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).

  • Apparatus and method for checkpointing simulation data in a simulator
    Patent number: 8050903
    Abstract: Apparatus for storing all logic simulation signal values generated by a logic simulator during a simulation run is provided. The apparatus includes a runtime array for storing a plurality of signal values for each time instance in a predetermined time period, and a checkpoint cache for selectively storing the plurality of signal values stored in the runtime array at selected time instances. A hyper-checkpoint array is further provided to checkpoint the signal values in the checkpoint cache. In addition, the time instances and values of memory writes are also checkpointed. A user may retrieve the value of any signal values generated during the simulation run and may additionally rewind the simulator to a user-specified time in the simulation run.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: November 1, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Patrick W. Bosshart, Derek James Smith, Daniel Charles Pickens, Douglas J. Matzke