Patents by Inventor Dien M. Nguyen

Dien M. Nguyen 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).

  • Adaptive receiver linearity techniques for a radio transceiver
    Patent number: 6298221
    Abstract: Characteristic of the transceiver is altered when intermodulation distortion is detected. This can increase bias to the LNA or reduce the signal to the LNA.
    Type: Grant
    Filed: April 1, 1998
    Date of Patent: October 2, 2001
    Assignee: Denso Corporation
    Inventor: Dien M. Nguyen
  • Temperature compensated wide dynamic range power detection circuitry for portable RF transmission terminals
    Patent number: 5796309
    Abstract: A detector for a portable telephone or the like samples RF transmit power, detects the sampled signal using a Schottky diode and uses a logarithmic amplifier to apply a compressive function to the post-detection signal. The compressive function emphasizes power level changes at the low end of the transmission spectrum and de-emphasizes power level changes at the high end of the transmission spectrum. In this way, the range of detected powers required to be processed by subsequent circuitry is reduced, thereby simplifying the design of the circuit. To improve stability of the detector with respect to temperature fluctuations, the semiconductor element in the amplifier which provides its logarithmic characteristics is temperature-compensated, as is the detector diode.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: August 18, 1998
    Assignee: Nippondenso Co., Ltd.
    Inventor: Dien M. Nguyen