Patents by Inventor Weifeng Feng

Weifeng Feng 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).

  • Calibration for power amplifier predistortion
    Patent number: 9595924
    Abstract: In one embodiment, a method comprising during a first calibration instance, converting at a first transconductance stage a first output voltage from a power amplifier of a transceiver to a first set of current signals; and during a second calibration instance not overlapping the first calibration instance, converting at a second transconductance stage a second output voltage from the power amplifier to a second set of current signals.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: March 14, 2017
    Assignee: Broadcom Corporation
    Inventors: Stephen Au, Vikram Magoon, Long Bu, Dandan Li, Weifeng Feng
  • CALIBRATION FOR POWER AMPLIFIER PREDISTORTION
    Publication number: 20140036973
    Abstract: In one embodiment, a method comprising during a first calibration instance, converting at a first transconductance stage a first output voltage from a power amplifier of a transceiver to a first set of current signals; and during a second calibration instance not overlapping the first calibration instance, converting at a second transconductance stage a second output voltage from the power amplifier to a second set of current signals.
    Type: Application
    Filed: August 3, 2012
    Publication date: February 6, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Stephen Au, Vikram Magoon, Long Bu, Dandan Li, Weifeng Feng
  • Phase shifter
    Patent number: 7756491
    Abstract: A phase shifter includes a plurality of variable gain elements, each variable gain element configured to receive one of a plurality of input signals, each input signal having a phase that is shifted with respect to each other input signal; and a control signal supplied to each variable gain element, where the control signals define a phase shift.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: July 13, 2010
    Assignee: Axiom Microdevices, Inc.
    Inventors: Scott D. Kee, Ichiro Aoki, Weifeng Feng
  • Phase Shifter
    Publication number: 20080032639
    Abstract: A phase shifter includes a plurality of variable gain elements, each variable gain element configured to receive one of a plurality of input signals, each input signal having a phase that is shifted with respect to each other input signal; and a control signal supplied to each variable gain element, where the control signals define a phase shift.
    Type: Application
    Filed: June 29, 2007
    Publication date: February 7, 2008
    Inventors: Scott D. Kee, Ichiro Aoki, Weifeng Feng