Patents by Inventor Chuanzhao Yu

Chuanzhao Yu 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).

  • DC OFFSET CALIBRATION IN A DIRECT CONVERSION RECEIVER
    Publication number: 20110201284
    Abstract: A direct conversion receiver (200) includes a low noise amplifier (LNA) (213), at least one baseband amplifier (119, 123 and 127), register banks (250 and 251) for storing a plurality of offset data corresponding to at least two LNA gain settings and a plurality of baseband gain settings, a DC offset correction system (235) for providing a DC offset signal, a state machine (275) for sequencing through each of the plurality of baseband gain settings and through enable and disable states for the LNA, and a processor (290) programmed to activate the state machine and to run the DC offset correction system.
    Type: Application
    Filed: April 28, 2011
    Publication date: August 18, 2011
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Jorge IVONNET, Chuanzhao YU
  • DC OFFSET CALIBRATION IN A DIRECT CONVERSION RECEIVER
    Publication number: 20090264090
    Abstract: A direct conversion receiver (200) includes a low noise amplifier (LNA) (213), at least one baseband amplifier (119, 123 and 127), register banks (250 and 251) for storing a plurality of offset data corresponding to at least two LNA gain settings and a plurality of baseband gain settings, a DC offset correction system (235) for providing a DC offset signal, a state machine (275) for sequencing through each of the plurality of baseband gain settings and through enable and disable states for the LNA, and a processor (290) programmed to activate the state machine and to run the DC offset correction system.
    Type: Application
    Filed: April 21, 2008
    Publication date: October 22, 2009
    Applicant: Freescale Semiconductor, Inc.
    Inventors: Jorge Ivonnet, Chuanzhao Yu