Patents by Inventor John G. Walden

John G. Walden 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).

  • Gated precision offset circuit for a digital meter having a dual slope analog-to-digital converter
    Patent number: 4303880
    Abstract: An offset circuit for use in providing an offset signal to an analog-to-digital converter. The analog-to-digital converter has an integrator for performing signal integrate operations and is connected to a digital display. The offset circuit is gated to provide a variable offset current directly to the integrator of the analog-to-digital converter, thereby eliminating adverse loading effects on the high input impedance of the analog-to-digital converter.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: December 1, 1981
    Assignee: Sangamo Weston, Inc.
    Inventors: Irwin Munt, Philip Emile, Jr., John G. Walden