Patents by Inventor Richard P. Card, JR.

Richard P. Card, 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).

  • Performance optimization of a differential capacitance based motion sensor
    Patent number: 10006930
    Abstract: A system includes a capacitance sensor having an inertial proof mass disposed between a first electrode structure and a second electrode structure. A switching system is switchable between providing one of a positive charge pulse and a negative charge pulse to one of the first electrode structure and the second electrode structure. A controller controls the switching of the switching circuit to provide one of the positive charge pulse or the negative charge pulse to the first electrode structure during a first portion of a charge cycle time period and to provide an opposite polarity charge pulse from that provided to the first electrode structure to the second electrode structure during a second portion of the charge cycle time period to generate an error signal with respect to the inertial proof mass of the capacitance sensor.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: June 26, 2018
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Juergen Karl Peter Flamm, John T. Douglass, Richard P. Card, Jr.
  • PERFORMANCE OPTIMIZATION OF A DIFFERENTIAL CAPACITANCE BASED MOTION SENSOR
    Publication number: 20150346236
    Abstract: A system includes a capacitance sensor having an inertial proof mass disposed between a first electrode structure and a second electrode structure. A switching system is switchable between providing one of a positive charge pulse and a negative charge pulse to one of the first electrode structure and the second electrode structure. A controller controls the switching of the switching circuit to provide one of the positive charge pulse or the negative charge pulse to the first electrode structure during a first portion of a charge cycle time period and to provide an opposite polarity charge pulse from that provided to the first electrode structure to the second electrode structure during a second portion of the charge cycle time period to generate an error signal with respect to the inertial proof mass of the capacitance sensor.
    Type: Application
    Filed: June 3, 2014
    Publication date: December 3, 2015
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: JUERGEN KARL PETER FLAMM, John T. Douglass, Richard P. Card, JR.