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A 14-BIT BANDPASS MASH SIGMA-DELTA PIPELINE A/D CONVERTER

S. Marabelli, A. Fornasari, P. Malcovati, F. Maloberti
  • Abstract:
    In this paper a two stage bandpass MASH (multi-stage noise shaping) sigma-delta (Σ∆) modulator is presented. A resolution of 14 bits has been achieved over a 5 MHz band around an intermediate frequency (IF) of 20 MHz with a clock frequency of 80 MHz. This performance is obtained using a 6-th order bandpass Σ∆ modulator followed by a 10 bit pipeline converter. The proposed circuit has been extensively simulated, both at behavioral and at circuit level, and results are illustrated.
  • Keywords:
    Bandpass Σ∆ modulator, MASH Σ∆ modulator, A/D converter
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  • DOI:
    _unreg_iwadc-2003.22

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