Patents by Inventor Jeremy K. A. Everard

Jeremy K. A. Everard 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).

  • R. F. power amplifier
    Patent number: 4743858
    Abstract: An r.f. power amplifier, typically a high efficiency, class E amplifier in which a reactive load circuit (18) is connected to a semiconductor switching device (10), the load circuit being designed to have the required input load angle and loaded Q so that the voltage across the device (10) goes to zero with zero slope before it switches on and passes current, is provided with a step recovery diode (32) connected to the device (10) to limit the voltage swing across the device (10) with no significant loss of efficiency. This allows the voltage-handling capability required of the device to be reduced or the amplifier output power to be increased by increasing the supply voltage.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: May 10, 1988
    Assignee: U.S. Philips Corp.
    Inventor: Jeremy K. A. Everard