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).

  • Publication number: 20120187927
    Abstract: Apparatus for voltage regulation circuits and related operating methods are provided. An exemplary voltage regulation circuit includes a voltage regulation arrangement that provides a regulated output voltage based on an input voltage reference, a phase compensation arrangement coupled to the voltage regulation arrangement and configured to increase a phase margin of the voltage regulation arrangement, and detection circuitry coupled to the phase compensation arrangement. The detection circuitry is configured to disable the phase compensation arrangement in response to detecting an output current that is less than a threshold value.
    Type: Application
    Filed: January 25, 2011
    Publication date: July 26, 2012
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Chuanzhao Yu, Luis J. Briones
  • Publication number: 20120178400
    Abstract: Apparatus are provided for amplifier circuits and related receiver systems. An amplifier circuit includes a first common-source amplification stage and a second common-source amplification stage. The input of the second common-source amplification stage is coupled to the output of the first common-source amplification stage such that the first common-source amplification stage generates a first amplified signal, and the second common-source amplification stage generates a second amplified signal based on the first amplified signal. The first common-source amplification stage is coupled to a first node and the second common-source amplification stage is coupled to a second node, wherein the common-source amplification stages are configured such that a current between the first node and the second node flows in series through the common-source amplification stages.
    Type: Application
    Filed: January 11, 2011
    Publication date: July 12, 2012
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Chuanzhao Yu, Salem Eid
  • Patent number: 8150360
    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: Grant
    Filed: April 28, 2011
    Date of Patent: April 3, 2012
    Inventors: Jorge Ivonnet, Chuanzhao Yu
  • Patent number: 8010077
    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: Grant
    Filed: April 21, 2008
    Date of Patent: August 30, 2011
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Jorge Ivonnet, Chuanzhao Yu
  • 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
  • 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