Patents by Inventor Timothy R. Ouellette

Timothy R. Ouellette 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).

  • Method of estimating logic cell delay time
    Patent number: 5274568
    Abstract: A method for approximating the delay time of an excitation through a logic cell using the summation of a base delay, which is a function of delay coefficients for the cell and the total output load capacitance of the cell, and a rise/fall time correction, which is determined from the output rise/fall time of the driving cell and the sensitivity of the analyzed cell to rise/fall time. Other corrections/compensating factors include a performance derating factor which accounts for the multiplicative effects of operating voltage, temperature and process.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: December 28, 1993
    Assignee: NCR Corporation
    Inventors: Richard D. Blinne, Richard J. Holzer, Jr., Timothy R. Ouellette, Rhea R. Ozman, Richard A. Laubhan, John Scott