• DocumentCode
    3332959
  • Title

    A multi-bit Sigma-Delta modulator using ratio-independent feedback DAC

  • Author

    Song, Yu ; Moule, Eric C.

  • Author_Institution
    Dept. of Electr. & Comput. Eng., Univ. of Rochester, Rochester, NY, USA
  • fYear
    2009
  • fDate
    2-5 Aug. 2009
  • Firstpage
    389
  • Lastpage
    392
  • Abstract
    A 3-bit 3rd-order Sigma-Delta modulator employing a switched-capacitor multiply-by-N DAC is described in this paper. The DAC is implemented in a capacitor mismatch independent way to improve circuit linearity. Theoretical analysis on the effect of finite op amp DC gain on DAC linearity is given. A prototype Sigma-Delta modulator for verification purpose was built with discrete components on printed circuit boards. Experimental results and timing, area, power considerations are addressed.
  • Keywords
    circuit feedback; modulators; operational amplifiers; printed circuits; sigma-delta modulation; switched capacitor networks; DAC linearity; finite op amp gain; multibit sigma-delta modulator; printed circuit board; ratio-independent feedback DAC; switched-capacitor DAC; Analog-digital conversion; Calibration; Circuits; Delta-sigma modulation; Feedback; Linearity; Operational amplifiers; Prototypes; Virtual colonoscopy; Voltage;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Circuits and Systems, 2009. MWSCAS '09. 52nd IEEE International Midwest Symposium on
  • Conference_Location
    Cancun
  • ISSN
    1548-3746
  • Print_ISBN
    978-1-4244-4479-3
  • Electronic_ISBN
    1548-3746
  • Type

    conf

  • DOI
    10.1109/MWSCAS.2009.5236072
  • Filename
    5236072
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3332959