Patents by Inventor Eric R. Schumann

Eric R. Schumann 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).

  • Tuning a programmable power line filter
    Patent number: 8576022
    Abstract: Tuning a programmable power line filter, the power line filter including a live line, a neutral line, and a ground line connected to input terminals of the filter on an input side of the filter, the live line and the neutral line connected through inductors in the filter to output terminals on an output side of the filter, X-capacitors selectably connected through tuning switches between the live line and the neutral line, Y-capacitors selectably connected through tuning switches between the live line and ground and/or between the neutral line and ground, and a tuning control circuit connected to the tuning switches and selectably connected through one or more programming switches to the load, including measuring by the tuning control circuit the input impedance of the load and programming by the tuning control circuit the tuning switches in dependence upon the input impedance of the load.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: November 5, 2013
    Assignee: International Business Machines Corporation
    Inventors: Eric N. Chikando, Brad E. Dillon, Tuan D. Ngo, William J. Roberts, Eric R. Schumann, Ronald L. Underwood
  • Tuning A Programmable Power Line Filter
    Publication number: 20110128087
    Abstract: Tuning a programmable power line filter, the power line filter including a live line, a neutral line, and a ground line connected to input terminals of the filter on an input side of the filter, the live line and the neutral line connected through inductors in the filter to output terminals on an output side of the filter, X-capacitors selectably connected through tuning switches between the live line and the neutral line, Y-capacitors selectably connected through tuning switches between the live line and ground and/or between the neutral line and ground, and a tuning control circuit connected to the tuning switches and selectably connected through one or more programming switches to the load, including measuring by the tuning control circuit the input impedance of the load and programming by the tuning control circuit the tuning switches in dependence upon the input impedance of the load.
    Type: Application
    Filed: December 2, 2009
    Publication date: June 2, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Eric N. Chikando, Brad E. Dillon, Tuan D. Ngo, William J. Roberts, Eric R. Schumann, Ronald L. Underwood