Patents by Inventor Greg Yuen

Greg Yuen 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).

  • Automatic current reduction biasing technique for RF amplifier
    Patent number: 6998918
    Abstract: A power amplifier (PA) circuit is disclosed that comprises a PA output stage having a first amplifying portion having a first gain portion and disposed in parallel with a second amplifying portion having a second gain portion, the PA output stage having an output stage gain, an input port for receiving of a RF input signal. A second RF power detector is provided for detecting a signal power of the RF input signal and for providing a second detected signal. An at least a biasing circuit is provided for biasing the first amplifying portion and the second amplifying portion in dependence upon the second detected signal for amplifying the RF input signal such that for the output stage gain the ratio between the first gain portion and the second gain portion varies in dependence upon the second detected signal.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: February 14, 2006
    Assignee: SiGe Semiconductor (U.S.), Corp.
    Inventors: Mark Doherty, Anthony Quaglietta, Greg Yuen
  • Automatic current reduction biasing technique for RF amplifier
    Publication number: 20050225394
    Abstract: A power amplifier (PA) circuit is disclosed that comprises a PA output stage having a first amplifying portion having a first gain portion and disposed in parallel with a second amplifying portion having a second gain portion, the PA output stage having an output stage gain, an input port for receiving of a RF input signal. A second RF power detector is provided for detecting a signal power of the RF input signal and for providing a second detected signal. An at least a biasing circuit is provided for biasing the first amplifying portion and the second amplifying portion in dependence upon the second detected signal for amplifying the RF input signal such that for the output stage gain the ratio between the first gain portion and the second gain portion varies in dependence upon the second detected signal.
    Type: Application
    Filed: April 8, 2004
    Publication date: October 13, 2005
    Inventors: Mark Doherty, Anthony Quaglietta, Greg Yuen