• DocumentCode
    1289609
  • Title

    Design techniques for high-resolution current-mode sigma-delta modulators

  • Author

    Moeneclaey, Nicolas ; Kaiser, Andreas

  • Author_Institution
    Dept. ISEN, CNRS, Lille, France
  • Volume
    32
  • Issue
    7
  • fYear
    1997
  • fDate
    7/1/1997 12:00:00 AM
  • Firstpage
    953
  • Lastpage
    958
  • Abstract
    This paper describes techniques for the design of high-resolution oversampling analog-to-digital converters based on current memories. A key point is the reduction of nonlinearities, in particular those introduced by the current switches. A current-memory cell with very high precision and linearity has been designed and used in an experimental third-order Σ-δ modulator in a 0.8-μm digital CMOS process. A linearity of better than 14 b and a maximum signal-to-noise+distortion ratio (SNDR) of 80 dB has been measured for an oversampling ratio (OSR) of 64
  • Keywords
    CMOS integrated circuits; cellular arrays; integrated circuit design; sigma-delta modulation; 0.8 micron; current memories; current switches; current-memory cell; digital CMOS process; high-resolution current-mode sigma-delta modulators; linearity; nonlinearities; oversampling ratio; signal-to-noise+distortion ratio; Analog-digital conversion; Baseband; Capacitors; Circuit noise; Clocks; Delta-sigma modulation; Linearity; Multi-stage noise shaping; Signal to noise ratio; Switches;
  • fLanguage
    English
  • Journal_Title
    Solid-State Circuits, IEEE Journal of
  • Publisher
    ieee
  • ISSN
    0018-9200
  • Type

    jour

  • DOI
    10.1109/4.597285
  • Filename
    597285