• DocumentCode
    49615
  • Title

    Noise-shaping SAR ADC using three capacitors

  • Author

    Chen, Chun-Hung ; Zhang, Ye ; Ceballos, Jose Luis ; Temes, Gabor C.

  • Author_Institution
    Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR, USA
  • Volume
    49
  • Issue
    3
  • fYear
    2013
  • fDate
    Jan. 31 2013
  • Firstpage
    182
  • Lastpage
    184
  • Abstract
    A simple and highly efficient successive-approximation registers (SAR) ADC realisation is proposed. It requires an opamp, a comparator and only three equal-valued capacitors. The proposed scheme is insensitive to the capacitor parasitics, and has a small capacitance spread. With an oversampled scheme, it also allows noise-shaping the remaining quantisation error. It is well-suited for low-frequency instrumentation and measurement applications, and for use in extended-counting ADCs.
  • Keywords
    analogue-digital conversion; approximation theory; capacitors; comparators (circuits); operational amplifiers; capacitor parasitics; comparator; equal-valued capacitor; extended-counting ADC; low-frequency instrumentation; low-frequency measurement; noise-shaping SAR ADC; opamp; quantisation error; successive-approximation register ADC realisation;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el.2012.4204
  • Filename
    6457558