Patents by Inventor William J. Urschel

William J. Urschel 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 and apparatus for minimizing digital-to-analog converter correction trims
    Patent number: 4673917
    Abstract: A method of calibrating a feed forward, DAC post-correction system. The method includes fitting the Walsh co-efficiencts of a DAC transfer function to a straight line in the log domain. The deviation of these terms in the log domain is utilized to compute Walsh correction terms for use in the post correction system.
    Type: Grant
    Filed: July 18, 1984
    Date of Patent: June 16, 1987
    Assignee: Fairchild Semiconductor Corporation
    Inventors: William J. Urschel, Edwin A. Sloane