Patents by Inventor Chris Joly

Chris Joly 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).

  • Self-boosting circuit for a power amplifier
    Patent number: 6492875
    Abstract: A power amplifier circuit includes an amplifying transistor and a dc bias circuit for biasing the amplifier transistor to obtain a conduction angle of at least about 180°. The dc bias circuit includes a self-bias boosting circuit for initially decreasing and then increasing the dc bias voltage provided to a control terminal of the amplifying transistor by the dc bias circuit as the input signal provided to the power amplifier increases. The self-bias boosting circuit is extremely simple and compact in design, and permits the power amplifier circuits to operate in Class B or Class AB with improved power output characteristics.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: December 10, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Sifen Luo, Tirdad Sowlati, Chris Joly, Kerry Burger
  • Self-boosting circuit for a power amplifier
    Publication number: 20020067209
    Abstract: A power amplifier circuit includes an amplifying transistor and a dc bias circuit for biasing the amplifier transistor to obtain a conduction angle of at least about 180°. The dc bias circuit includes a self-bias boosting circuit for initially decreasing and then increasing the dc bias voltage provided to a control terminal of the amplifying transistor by the dc bias circuit as the input signal provided to the power amplifier increases. The self-bias boosting circuit is extremely simple and compact in design, and permits the power amplifier circuits to operate in Class B or Class AB with improved power output characteristics.
    Type: Application
    Filed: December 6, 2000
    Publication date: June 6, 2002
    Applicant: Philips Electronics North America Corporation
    Inventors: Sifen Luo, Tirdad Sowlati, Chris Joly, Kerry Burger