Patents by Inventor J. Anson Whealler, Jr.

J. Anson Whealler, Jr. 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).

  • Differential voltage measuring circuit
    Patent number: 4659997
    Abstract: Apparatus for measuring the difference between two voltages in which a first current proportional to the voltage difference is generated at a first point, and there is circuitry for delivering at a second point a second current that is based on the first current and is indicative of the voltage difference; the circuitry includes an uninterrupted current path from the first point to the second point and the current path has a circuit element across which at least a portion of the common mode voltage appears; and the circuit element provides an output current to the path which is independent of the voltage across the circuit element.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: April 21, 1987
    Assignee: Teradyne, Inc.
    Inventors: Michael R. Ferland, Roger V. Burns, Jr., J. Anson Whealler, Jr.