Patents by Inventor Matthew L. McCullough

Matthew L. McCullough 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).

  • Minimum pulsewidth test module on clocked logic integrated circuit
    Patent number: 5161161
    Abstract: An integrated circuit chip which contains conventional clocked logic circuitry also contains a tester module for determining the minimum pulsewidth at which the clocked logic circuitry will operate. This tester module occupies a very small portion of the chip, yet it is able to generate several different variable width clock pulse sequences in which the pulsewidths range from being large enough for the clocked logic circuitry to properly operate to being too small for proper operation. By passing these sequences through the clocked logic circuitry, the minimum pulsewidth at which that circuitry will operate can be easily determined.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: November 3, 1992
    Assignee: Unisys Corporation
    Inventors: Behnam Malek-Khosravi, Matthew L. McCullough, Steven M. Domer