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A 1-V 416-nW FULLY INTEGRATED SENSOR INTERFACE IC FOR PACEMAKERS

Salim Alahdab, Reza Lotfi, Wouter A. Serdijn
  • Abstract:
    An ultra-low-power, low-noise sensor interface IC for pacemakers is presented. The proposed architecture is designed to achieve small chip area and a good trade-off between power consumption and noise figure by using current-mode operation. The IECG signal, from 50 mHz-100 Hz, is first filtered by a bandpass filter. Subsequently, the signal output of the filter is converted into a current by a nonlinear transconductance (Gm) cell. The output of the Gm-cell is digitized by a nonlinear 8-bit 1 kS/s Current-mode Successive Approximation ADC to compensate for the nonlinearity of the Gm-cell. The simulated input-referred noise is 5.48 µVrms, achieving a Noise Efficiency Factor of 3.3, and the simulated power consumption for the overall system is 416 nW while operating from a 1 V supply.
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  • DOI:
    _unreg_iwadc-2011.25

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