Patents by Inventor Weijie Yun

Weijie Yun 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).

  • Patent number: 8203653
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: June 19, 2012
    Assignee: Telegent Systems, Inc.
    Inventors: Weijie Yun, Samuel Sheng, Dennis G. Yee
  • Patent number: 8077262
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes a mixing circuit to mix an analog video signal with a sinusoid to generate a frequency-shifted analog video signal, and an offset cancellation circuit to obtain a sample of the frequency-shifted analog video signal during a first time interval and, based on the sample, generate an offset cancellation signal that, when summed with the frequency-shifted analog video signal, reduces a substantially time-invariant offset in the frequency-shifted analog video signal.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: December 13, 2011
    Assignee: Telegent Systems, Inc.
    Inventors: Weijie Yun, Samuel Sheng
  • Patent number: 7932845
    Abstract: A self-calibrating analog-to-digital converter (ADC). The ADC includes multiple component ADCs to generate respective digital representations of an input signal in response to respective timing signals that are offset in phase from one another, each component ADC having a gain setting that controls a magnitude of the digital representations. The ADC further includes correction circuitry to generate a plurality of fast-Fourier transforms (FFTs) that correspond to the digital representations of the input signal and to adjust the gain settings of the component ADCs and/or phase angles of the timing signals based on gain and phase errors indicated by the FFTs.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: April 26, 2011
    Assignee: Telegent Systems, Inc.
    Inventors: Samuel Sheng, Weijie Yun
  • Patent number: 7932958
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: April 26, 2011
    Assignee: Telegent Systems, Inc.
    Inventors: Weijie Yun, Samuel Sheng, Dennis G. Yee
  • Patent number: 7929060
    Abstract: An integrated circuit device having a television signal tuner, video decoder and power control circuit. The television signal tuner selects one of a plurality of television channels, and the video decoder converts a television signal conveyed in the selected television channel into a video display signal. The power control circuit alternately enables and disables the television tuner to enable reception of a first portion of video information conveyed in the television signal and to disable reception of a second portion of the video information.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: April 19, 2011
    Assignee: Telegent Systems, Inc.
    Inventors: Weijie Yun, Samuel Sheng
  • Publication number: 20100225820
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
    Type: Application
    Filed: May 20, 2010
    Publication date: September 9, 2010
    Inventors: Weijie Yun, Samuel Sheng, Dennis G. Yee
  • Patent number: 7675441
    Abstract: A self-calibrating analog-to-digital converter (ADC). The ADC includes multiple component ADCs to generate respective digital representations of an input signal in response to respective timing signals that are offset in phase from one another, each component ADC having a gain setting that controls a magnitude of the digital representations. The ADC further includes correction circuitry to generate a plurality of fast-Fourier transforms (FFTs) that correspond to the digital representations of the input signal and to adjust the gain settings of the component ADCs and/or phase angles of the timing signals based on gain and phase errors indicated by the FFTs.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: March 9, 2010
    Assignee: Telegent Systems, Inc.
    Inventors: Samuel Sheng, Weijie Yun
  • Publication number: 20090185079
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
    Type: Application
    Filed: March 12, 2009
    Publication date: July 23, 2009
    Inventors: Weijie Yun, Samuel Sheng, Dennis G. Yee
  • Patent number: 7508451
    Abstract: Phase noise mitigation in an analog video receiver implemented in an integrated circuit device. A phase correction value that indicates a phase offset between a synthesized sinusoid and a reference sinusoid conveyed in a horizontal retrace region of a composite video signal is periodically generated. A phase error that will accumulate during an interval between horizontal retrace regions of the composite video signal is estimated based, at least in part, on the phase correction value, and the phase of a chroma signal component of the composite video signal is adjusted based on the estimated phase error.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: March 24, 2009
    Assignee: Telegent Systems, Inc.
    Inventors: Samuel Sheng, Weijie Yun
  • Patent number: 7505086
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes a mixing circuit to mix an analog video signal with a sinusoid to generate a frequency-shifted analog video signal, and an offset cancellation circuit to obtain a sample of the frequency-shifted analog video signal during a first time interval and, based on the sample, generate an offset cancellation signal that, when summed with the frequency-shifted analog video signal, reduces a substantially time-invariant offset in the frequency-shifted analog video signal.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: March 17, 2009
    Assignee: Telegent Systems, Inc.
    Inventors: Weijie Yun, Samuel Sheng
  • Publication number: 20080297664
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
    Type: Application
    Filed: August 14, 2008
    Publication date: December 4, 2008
    Inventors: Weijie Yun, Samuel Sheng, Dennis G. Yee
  • Patent number: 7453526
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: November 18, 2008
    Assignee: Telegent Systems, Inc.
    Inventors: Weijie Yun, Samuel Sheng, Dennis G. Yee
  • Publication number: 20080260044
    Abstract: A multichannel video receiver having an analog-to-digital converter, fast-Fourier transform circuit and inverse-Fourier transform circuit. The analog-to-digital converter circuit generates a digitized representation of a frequency band used to convey a plurality of video signals, and the fast-Fourier transform circuit generates a frequency-domain representation of the digitized representation of the frequency band. The inverse-Fourier transform circuit recovers, from the frequency-domain representation, a plurality of digitized time-domain signals that correspond to the plurality of video signals.
    Type: Application
    Filed: May 20, 2008
    Publication date: October 23, 2008
    Inventors: Weijie Yun, Samuel Sheng
  • Publication number: 20080158433
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes a mixing circuit to mix an analog video signal with a sinusoid to generate a frequency-shifted analog video signal, and an offset cancellation circuit to obtain a sample of the frequency-shifted analog video signal during a first time interval and, based on the sample, generate an offset cancellation signal that, when summed with the frequency-shifted analog video signal, reduces a substantially time-invariant offset in the frequency-shifted analog video signal.
    Type: Application
    Filed: March 6, 2008
    Publication date: July 3, 2008
    Inventors: Weijie Yun, Samuel Sheng
  • Publication number: 20080030387
    Abstract: A self-calibrating analog-to-digital converter (ADC). The ADC includes multiple component ADCs to generate respective digital representations of an input signal in response to respective timing signals that are offset in phase from one another, each component ADC having a gain setting that controls a magnitude of the digital representations. The ADC further includes correction circuitry to generate a plurality of fast-Fourier transforms (FFTs) that correspond to the digital representations of the input signal and to adjust the gain settings of the component ADCs and/or phase angles of the timing signals based on gain and phase errors indicated by the FFTs.
    Type: Application
    Filed: October 12, 2007
    Publication date: February 7, 2008
    Inventors: Samuel Sheng, Weijie Yun
  • Patent number: 7283074
    Abstract: A self-calibrating analog-to-digital converter (ADC). The ADC includes multiple component ADCs to generate respective digital representations of an input signal in response to respective timing signals that are offset in phase from one another, each component ADC having a gain setting that controls a magnitude of the digital representations. The ADC further includes correction circuitry to generate a plurality of fast-Fourier transforms (FFTs) that correspond to the digital representations of the input signal and to adjust the gain settings of the component ADCs and/or phase angles of the timing signals based on gain and phase errors indicated by the FFTs.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: October 16, 2007
    Assignee: Telegent Systems, Inc.
    Inventors: Samuel Sheng, Weijie Yun
  • Publication number: 20060061501
    Abstract: A self-calibrating analog-to-digital converter (ADC). The ADC includes multiple component ADCs to generate respective digital representations of an input signal in response to respective timing signals that are offset in phase from one another, each component ADC having a gain setting that controls a magnitude of the digital representations. The ADC further includes correction circuitry to generate a plurality of fast-Fourier transforms (FFTs) that correspond to the digital representations of the input signal and to adjust the gain settings of the component ADCs and/or phase angles of the timing signals based on gain and phase errors indicated by the FFTs.
    Type: Application
    Filed: September 21, 2005
    Publication date: March 23, 2006
    Inventors: Samuel Sheng, Weijie Yun
  • Publication number: 20060017856
    Abstract: Phase noise mitigation in an analog video receiver implemented in an integrated circuit device. A phase correction value that indicates a phase offset between a synthesized sinusoid and a reference sinusoid conveyed in a horizontal retrace region of a composite video signal is periodically generated. A phase error that will accumulate during an interval between horizontal retrace regions of the composite video signal is estimated based, at least in part, on the phase correction value, and the phase of a chroma signal component of the composite video signal is adjusted based on the estimated phase error.
    Type: Application
    Filed: September 21, 2005
    Publication date: January 26, 2006
    Inventors: Samuel Sheng, Weijie Yun
  • Publication number: 20050243219
    Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.
    Type: Application
    Filed: May 2, 2005
    Publication date: November 3, 2005
    Inventors: Weijie Yun, Samuel Sheng, Dennis Yee
  • Publication number: 20050243220
    Abstract: An integrated circuit device having a television signal tuner, video decoder and power control circuit. The television signal tuner selects one of a plurality of television channels, and the video decoder converts a television signal conveyed in the selected television channel into a video display signal. The power control circuit alternately enables and disables the television tuner to enable reception of a first portion of video information conveyed in the television signal and to disable reception of a second portion of the video information.
    Type: Application
    Filed: May 2, 2005
    Publication date: November 3, 2005
    Inventors: Weijie Yun, Samuel Sheng