• DocumentCode
    1303942
  • Title

    Continuous time Δ Σ modulation with PWM pre-coding and binary gm blocks

  • Author

    Babaie Fishani, A. ; Rombouts, P.

  • Author_Institution
    ELIS, Univ. of Gent, Ghent, Belgium
  • Volume
    48
  • Issue
    19
  • fYear
    2012
  • Firstpage
    1187
  • Lastpage
    1188
  • Abstract
    A very simple technique to implement the first integrator of a continuous-time delta sigma modulator (CT-DSM) is presented. In the approach, the CT-DSM is preceded by a pulse-width modulator to convert the input signal to a pseudo-digital continuous time waveform. As a result, the first integrator of the DSM can be implemented with a capacitor and a switched current source, with inherent linearity. To illustrate the concept, it has been applied to the design of a second-order CT-DSM in 65 nm CMOS technology.
  • Keywords
    CMOS integrated circuits; capacitors; constant current sources; continuous time systems; delta-sigma modulation; integrating circuits; modulators; precoding; pulse width modulation; CMOS technology; PWM precoding; binary gm blocks; capacitor; continuous time ΔΣ modulation; continuous time delta sigma modulator; first CT-DSM integrator implement; input signal conversion; pseudodigital continuous time waveform; pulse width modulator; second-order CT-DSM design; size 65 nm; switched current source;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el.2012.2697
  • Filename
    6317228
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1303942