Patents by Inventor Zhang Weibiao

Zhang Weibiao 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).

  • Dynamic dither for sigma-delta converters
    Patent number: 7362250
    Abstract: A sigma-delta converter having dynamic dithering that reduces or removes idle-channel tones and increase linearity of the converter. The dither is differentiated in multiple orders before being applied to the converter quantizer. The differentiation order and the amplitude of the dither are determined dynamically based on the input signal amplitude in order to obtain the most effectiveness of dithering. The dynamic dither can be used in both analog-to-digital and digital-to-analog converters.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: April 22, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Zhang Weibiao, James R. Hochschild
  • Dynamic dither for sigma-delta converters
    Publication number: 20060170576
    Abstract: A sigma-delta converter having dynamic dithering that reduces or removes idle-channel tones and increase linearity of the converter. The dither is differentiated in multiple orders before being applied to the converter quantizer. The differentiation order and the amplitude of the dither are determined dynamically based on the input signal amplitude in order to obtain the most effectiveness of dithering. The dynamic dither can be used in both analog-to-digital and digital-to-analog converters.
    Type: Application
    Filed: January 31, 2005
    Publication date: August 3, 2006
    Inventors: Zhang Weibiao, James Hochschild