Patents by Inventor Marquis Christian Julien

Marquis Christian Julien 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).

  • Method of adjusting gain and current consumption of a power amplifier circuit while maintaining linearity
    Patent number: 6646510
    Abstract: The gain and current consumption of a power amplifier are adjusted while maintaining amplified output signal linearity. Where linearity and low power consumption are maintained for the amplifier by controllable shunting of an input signal amplitude and by providing a predetermined bias signal to the amplifier circuit in a precalibrated manner. A mapping circuit is disposed for receiving a control signal and for providing the predetermined bias signal to the amplifier circuit in the precalibrated manner. The mapping circuit is either internally provided within the same circuit as the power amplifier, or externally.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: November 11, 2003
    Assignee: SiGe Semiconductor Inc.
    Inventors: Marquis Christian Julien, Walter Wayne
  • METHOD OF ADJUSTING GAIN AND CURRENT CONSUMPTION OF A POWER AMPLIFIER CIRCUIT WHILE MAINTAINING LINEARITY
    Publication number: 20030164735
    Abstract: The gain and current consumption of a power amplifier are adjusted while maintaining amplified output signal linearity. Where linearity and low power consumption are maintained for the amplifier by controllable shunting of an input signal amplitude and by providing a predetermined bias signal to the amplifier circuit in a precalibrated manner. A mapping circuit is disposed for receiving a control signal and for providing the predetermined bias signal to the amplifier circuit in the precalibrated manner. The mapping circuit is either internally provided within the same circuit as the power amplifier, or externally.
    Type: Application
    Filed: March 1, 2002
    Publication date: September 4, 2003
    Inventors: Marquis Christian Julien, Walter Wayne
  • Circuit for linearizing the power control profile of a BiCMOS power amplifier
    Patent number: 6518840
    Abstract: A two stage amplifier for a portable or cellular phone is disclosed which is manufactured using a fast BiCMOS process suach as SiGe. A shunt circuit controlled by a switch is provided between a base of one of the amplifying transistors and a DC terminal to prevent it from operating in a Class B mode of operation when it is intended for the amplifier to be switched off.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: February 11, 2003
    Assignee: SiGe Semiconductor Inc.
    Inventors: David George Rahn, Marquis Christian Julien