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A CONTINUOUS-TIME FIRST ORDER Σ-Δ CONVERTER WITH OFFSET CALIBRATION FOR BIOLOGICAL APPLICATION

F. Borghetti, N. Massari, D. Stoppa, A. Adami, L. Lorenzelli
  • Abstract:
    In the present paper, a continuous time Σ?-Δ converter for biological application is presented. The implemented ASIC has been designed for reading piezo-resistive MEMS cantilever used as DNA detector. The readout channel consists of a first analog front-end circuit able to reduce possible input offset and electronic mismatch, followed by a continuous-time 9b first order Σ?-Δ converter for digital conversion. Simulation results show a circuit accuracy on the measurement of resistance variation in the order of 10 ppm within a maximum range of 10%.
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  • DOI:
    _unreg_iwadc-2011.38

Event details:

  • IMEKO TC:
    TC4
  • Event name:
    IWADC 2011
  • Title:

    16th IMEKO International Workshop on ADC Modeling and Testing - Data Converter Design, Modeling and Testing (together with IEEE ADC Forum) (IWADC)

  • Place:
    Orvieto, ITALY
  • Time:
    30 June 2011 - 01 July 2011