A 0.7-V 10-bit 3μW analog-to-digital converter for implantable biomedical applications

Hsin Hung Ou, Ya Chi Chen, Bin Da Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

For implantable biosensor applications which require a low-cost signal processing unit that features ultra-low power and low-voltage capability as well, this paper proposes a solution by merging switched-opamp technique and foreground digital calibration into a single 10-bit ADC. Utilization of the switched-opamp technique allows for low supply operation down to 0.7 V. The insufficient gain associated with low supply voltage analog devices is manipulated by the employment of foreground calibration. Ultra-low power consumption is achieved through adequate circuit structure selection and weak-inversion transistor biasing. The ADC employs the cyclic/algorithmic architecture which uses only two opamps and two comparators. Simulation results with CMOS 0.13 μm process model demonstrate that the signal to noise and distortion ratio (SNDR) at 10-KHz clock rate is 57 dB when 0.5 % capacitor mismatch is considered. The power consumption of the whole ADC is 3 μW with 0.7 V supply.

Original languageEnglish
Title of host publicationIEEE 2006 Biomedical Circuits and Systems Conference Healthcare Technology, BioCAS 2006
Pages122-125
Number of pages4
DOIs
Publication statusPublished - 2006
EventIEEE 2006 Biomedical Circuits and Systems Conference Healthcare Technology, BioCAS 2006 - London, United Kingdom
Duration: 2006 Nov 292006 Dec 1

Publication series

NameIEEE 2006 Biomedical Circuits and Systems Conference Healthcare Technology, BioCAS 2006

Other

OtherIEEE 2006 Biomedical Circuits and Systems Conference Healthcare Technology, BioCAS 2006
Country/TerritoryUnited Kingdom
CityLondon
Period06-11-2906-12-01

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Electrical and Electronic Engineering

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