Patents by Inventor Thomas E. Marchok

Thomas E. Marchok 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).

  • Test pattern generation for an electronic circuit using a transformed circuit description
    Patent number: 5528604
    Abstract: Test pattern generation for a sequential logic circuit having combinational logic elements and sequential elements (D flip-flops) is enhanced in generation time and test pattern quality by first transforming the circuit to simplify the circuit for test pattern generation. In one embodiment the retiming transformation is used in which sequential elements are moved across combinational logic elements to increase the ratio of the total number of states which are traversable, and thus simplify the circuit for test pattern generation. The test set generated is equally applicable to the transformed test circuit as well as the manufactured circuit.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: June 18, 1996
    Assignee: Carnegie Mellon University
    Inventors: Aiman H. El-Maleh, Wojciech P. Maly, Thomas E. Marchok, Janusz E. Rajski