Patents by Inventor Fenton Rees

Fenton Rees 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).

  • Gate driver for enhancement-mode and depletion-mode wide bandgap semiconductor JFETs
    Patent number: 9019001
    Abstract: A DC-coupled two-stage gate driver circuit for driving a junction field effect transistor (JFET) is provided. The JFET can be a wide bandgap junction field effect transistor (JFET) such as a SiC JFET. The driver includes a first turn-on circuit, a second turn-on circuit and a pull-down circuit. The driver is configured to accept an input pulse-width modulation (PWM) control signal and generate an output driver signal for driving the gate of the JFET.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: April 28, 2015
    Assignee: Power Integrations, Inc.
    Inventors: Robin Lynn Kelley, Fenton Rees
  • GATE DRIVER FOR ENHANCEMENT-MODE AND DEPLETION-MODE WIDE BANDGAP SEMICONDUCTOR JFETS
    Publication number: 20120218011
    Abstract: A DC-coupled two-stage gate driver circuit for driving a junction field effect transistor (JFET) is provided. The JFET can be a wide bandgap junction field effect transistor (JFET) such as a SiC JFET. The driver includes a first turn-on circuit, a second turn-on circuit and a pull-down circuit. The driver is configured to accept an input pulse-width modulation (PWM) control signal and generate an output driver signal for driving the gate of the JFET.
    Type: Application
    Filed: May 10, 2012
    Publication date: August 30, 2012
    Applicant: SS SC IP, LLC
    Inventors: Robin Lynn KELLEY, Fenton REES
  • Gate driver for enhancement-mode and depletion-mode wide bandgap semiconductor JFETs
    Patent number: 8203377
    Abstract: A DC-coupled two-stage gate driver circuit for driving a junction field effect transistor (JFET) is provided. The JFET can be a wide bandgap junction field effect transistor (JFET) such as a SiC JFET. The driver includes a first turn-on circuit, a second turn-on circuit and a pull-down circuit. The driver is configured to accept an input pulse-width modulation (PWM) control signal and generate an output driver signal for driving the gate of the JFET.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: June 19, 2012
    Assignee: SS SC IP, LLC
    Inventors: Robin Lynn Kelley, Fenton Rees
  • GATE DRIVER FOR ENHANCEMENT-MODE AND DEPLETION-MODE WIDE BANDGAP SEMICONDUCTOR JFETS
    Publication number: 20100283515
    Abstract: A DC-coupled two-stage gate driver circuit for driving a junction field effect transistor (JFET) is provided. The JFET can be a wide bandgap junction field effect transistor (JFET) such as a SiC JFET. The driver includes a first turn-on circuit, a second turn-on circuit and a pull-down circuit. The driver is configured to accept an input pulse-width modulation (PWM) control signal and generate an output driver signal for driving the gate of the JFET.
    Type: Application
    Filed: May 11, 2010
    Publication date: November 11, 2010
    Applicant: SEMISOUTH LABORATORIES, INC.
    Inventors: Robin Lynn KELLEY, Fenton REES
  • Forced air cooler system
    Patent number: 5810072
    Abstract: A forced air cooler system designed to maximize heat transfer from a heat generating source to an airflow and minimize the overall size of the cooler system wherein the system contains a fan, heat sink, and inlet plenum. The fan is placed adjacent to the heat sink. The plenum contacts the fan at an angle and then intersects with the heat sink to direct the airflow to an exhaust area.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: September 22, 1998
    Assignee: SemiPower Systems, Inc.
    Inventors: Fenton Rees, Larry Rinehart
  • Torque angle control system for controlling the torque angle of a permanent magnet synchronous motor
    Patent number: 5006774
    Abstract: A torque angle control system for maintaining a predetermined torque angle in a synchronous motor having a speed command conversion circuit (10) for converting a speed command signal to a synchronous motor control signal, correcting the synchronous motor control signal and generating a fundamental signal related to the corrected synchronous motor control signal, position sensors (26) for sensing the rotational position of a rotor of the synchronous motor (20) and a comparator (30) for comparing the fundamental signal to a rotor position signal and outputting a correction signal to the speed command conversion circuit (10) for correcting the synchronous motor control signal to maintain a predetermined torque angle in the synchronous motor (20).
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: April 9, 1991
    Assignee: Sundstrand Corporation
    Inventor: Fenton Rees