Patents by Inventor Xuan Anh NGHIEM

Xuan Anh NGHIEM 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).

  • Sequential broadband doherty power amplifier with adjustable output power back-off
    Patent number: 9787255
    Abstract: The invention relates to a sequential broadband Doherty power amplifier with adjustable output power back-off The sequential broadband Doherty power amplifier has at least one input (I1, I2; RFin) for receiving at least one broadband HF signal, wherein the broadband HF signal or broadband HF signals (RFin) have at least an average power level (carrier/average) and a peak envelope power level (peak), with the average power level and the peak envelope power level defining a crest factor, and a first amplifier branch for amplifying the input signal, with the first amplifier branch providing the amplification substantially for the low and at least the average power level, at least one second amplifier branch for amplifying the input signal, wherein the second amplifier branch substantially provides the amplification for the peak envelope power level, wherein the output of the first amplifier branch is connected via an impedance inverter (ZT) to the output of the second amplifier branch, the junction (CN) being co
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: October 10, 2017
    Assignee: RWTH AACHEN
    Inventors: Renato Negra, Xuan Anh Nghiem
  • SEQUENTIAL BROADBAND DOHERTY POWER AMPLIFIER WITH ADJUSTABLE OUTPUT POWER BACK-OFF
    Publication number: 20160268976
    Abstract: The invention relates to a sequential broadband Doherty power amplifier with adjustable output power back-off The sequential broadband Doherty power amplifier has at least one input (I1, I2; RFin) for receiving at least one broadband HF signal, wherein the broadband HF signal or broadband HF signals (RFin) have at least an average power level (carrier/average) and a peak envelope power level (peak), with the average power level and the peak envelope power level defining a crest factor, and a first amplifier branch for amplifying the input signal, with the first amplifier branch providing the amplification substantially for the low and at least the average power level, at least one second amplifier branch for amplifying the input signal, wherein the second amplifier branch substantially provides the amplification for the peak envelope power level, wherein the output of the first amplifier branch is connected via an impedance inverter (ZT) to the output of the second amplifier branch, the junction (CN) being co
    Type: Application
    Filed: October 1, 2014
    Publication date: September 15, 2016
    Inventors: Renato NEGRA, Xuan Anh NGHIEM