• DocumentCode
    3568623
  • Title

    Comments on efficient dithering in digital delta-sigma modulator

  • Author

    Hongjia Mo ; Kennedy, Michael Peter

  • Author_Institution
    Sch. of Eng.-Electr. & Electron. Eng., Univ. Coll. Cork & Tyndall Nat. Inst., Cork, Ireland
  • fYear
    2014
  • Firstpage
    88
  • Lastpage
    91
  • Abstract
    The output spectra of digital delta sigma modulators (DDSMs) are characterized by unwanted spurious periodic tones (spurs). Additive pseudorandom dither is used to whiten the quantization noise of the DDSM in order to minimize these spurs. Unfortunately, pseudorandom dither signals are themselves periodic and may cause other spurs to appear. This paper describes a DDSM architecture with multiple periodic dither inputs and explains the limits of its performance.
  • Keywords
    delta-sigma modulation; quantisation (signal); DDSM architecture; additive pseudorandom dither; digital delta-sigma modulator; multiple periodic dither inputs; quantization noise; unwanted spurious periodic tones; Delta-sigma modulation; Frequency synthesizers; Generators; Modulation; Multi-stage noise shaping; Noise; Quantization (signal);
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Electronics, Circuits and Systems (ICECS), 2014 21st IEEE International Conference on
  • Type

    conf

  • DOI
    10.1109/ICECS.2014.7049928
  • Filename
    7049928
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3568623