Patents by Inventor Dennis O. Sparks

Dennis O. Sparks 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).

  • Capacitively coupled RF voltage probe having optimized flux linkage
    Patent number: 5867020
    Abstract: An RF sensor having a novel current sensing probe and a voltage sensing probe to measure voltage and current. The current sensor is disposed in a transmission line to link all of the flux generated by the flowing current in order to obtain an accurate measurement. The voltage sensor is a flat plate which operates as a capacitive plate to sense voltage on a center conductor of the transmission line, in which the measured voltage is obtained across a resistance leg of a R-C differentiator circuit formed by the characteristic impedance of a connecting transmission line and a capacitance of the plate, which is positioned proximal to the center conductor.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: February 2, 1999
    Assignee: Sematech, Inc.
    Inventors: James A. Moore, Dennis O. Sparks
  • RF current sensor
    Patent number: 5834931
    Abstract: An RF sensor having a novel current sensing probe and a voltage sensing probe to measure voltage and current. The current sensor is disposed in a transmission line to link all of the flux generated by the flowing current in order to obtain an accurate measurement. The voltage sensor is a flat plate which operates as a capacitive plate to sense voltage on a center conductor of the transmission line, in which the measured voltage is obtained across a resistance leg of a R-C differentiator circuit formed by the characteristic impedance of a connecting transmission line and a capacitance of the plate, which is positioned proximal to the center conductor.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: November 10, 1998
    Assignee: Sematech, Inc.
    Inventors: James A. Moore, Dennis O. Sparks