16-channel wide-range VLSI potentiostat array

Milutin Stanacevic, Kartikeya Murari, Gert Cauwenberghs, Nitish Thakor

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

Abstract

A 16-Channel current-measuring VLSI sensor array system for electrochemical detection of electroactive neurotransmilers like dopamine and nitric-oxide is presented. The designed ΛDC architecture is first-order single bit delta-sigma modulator with programmable over-sampling ratio. The modulation of feedback duty-cycle in modulator design enables choice of current range in accordance to magnitude and time constant of signal leading to current range that spans over six orders of magnitude and sensitivity up to picoamperes at hundred millisecond conversion time with power consumption of 300 μW. A 3mm × 3mm chip in 0.5 μm CMOS technology is used for real-time multi-channel acquisition of neuro-transmitter concentration.

Original languageEnglish (US)
Title of host publication2004 IEEE International Workshop on Biomedical Circuits and Systems
PagesS1.7.INV-17-S1.7.INV-20
StatePublished - Dec 1 2004
Event2004 IEEE International Workshop on Biomedical Circuits and Systems - Singapore, Singapore
Duration: Dec 1 2004Dec 3 2004

Publication series

Name2004 IEEE International Workshop on Biomedical Circuits and Systems

Other

Other2004 IEEE International Workshop on Biomedical Circuits and Systems
CountrySingapore
CitySingapore
Period12/1/0412/3/04

ASJC Scopus subject areas

  • Engineering(all)

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