Patents by Inventor John C. Carpenter

John C. Carpenter 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).

  • Constant current power circuit for horizontal deflection of cathode ray tube
    Patent number: 4642533
    Abstract: A circuit for providing input power to the horizontal deflection coil or yoke for a raster scan type of cathode ray tube. The circuit includes a closed loop current sensor which uses an operational amplifier to compare the sensed current with an adjustable reference voltage to provide a control for the current, thereby providing a constant current power source for a resonant deflection yoke flyback circuit. The current drive and S shaping capacitor are directly coupled to the deflection coil, omitting a coupling transformer and a linearity coil.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: February 10, 1987
    Assignee: Ocean Technology, Inc.
    Inventor: John C. Carpenter