VLSI potentiostat array for distributed electrochemical neural recording

Abhishek Bandyopadhyay; Grant Mulliken; Gert Cauwenberghs; Nitish V Thakor

VLSI potentiostat array for distributed electrochemical neural recording

Abhishek Bandyopadhyay, Grant Mulliken, Gert Cauwenberghs, Nitish V Thakor

School of Medicine

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A neurochemical sensor system is being developed to spatially sense and process neurotransmitters. This paper reports the design and VLSI implementation of a multi-channel potentiostat that interfaces to a nitric-oxide (NO) sensor array. Picoampere to microampere input currents are range-normalized with programmable gain, and digitized by a bank of current-mode delta-sigma analog-to-digital (A/D) converters. First-order noise shaping and 4,096-fold over-sampling provide high signal-to-noise ratio for the low-frequency NO transients. A shift register scans the buffered decimated delta-sigma outputs in bit-serial forward providing asynchronous sequential readout. An 8-channel potentiostat in 0.5 μm CMOS measures 1.5mm × 1.5mm, and consumes 0.5 mW power. The device is expected to serve as a valuable tool for neurophysiological research and implantable neural prostheses.

Original language	English (US)
Title of host publication	Proceedings - IEEE International Symposium on Circuits and Systems
Volume	2
Publication status	Published - 2002
Event	2002 IEEE International Symposium on Circuits and Systems - Phoenix, AZ, United States Duration: May 26 2002 → May 29 2002

Other

Other	2002 IEEE International Symposium on Circuits and Systems
Country	United States
City	Phoenix, AZ
Period	5/26/02 → 5/29/02

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ASJC Scopus subject areas

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

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Bandyopadhyay, A., Mulliken, G., Cauwenberghs, G., & Thakor, N. V. (2002). VLSI potentiostat array for distributed electrochemical neural recording. In Proceedings - IEEE International Symposium on Circuits and Systems (Vol. 2)

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title = "VLSI potentiostat array for distributed electrochemical neural recording",

abstract = "A neurochemical sensor system is being developed to spatially sense and process neurotransmitters. This paper reports the design and VLSI implementation of a multi-channel potentiostat that interfaces to a nitric-oxide (NO) sensor array. Picoampere to microampere input currents are range-normalized with programmable gain, and digitized by a bank of current-mode delta-sigma analog-to-digital (A/D) converters. First-order noise shaping and 4,096-fold over-sampling provide high signal-to-noise ratio for the low-frequency NO transients. A shift register scans the buffered decimated delta-sigma outputs in bit-serial forward providing asynchronous sequential readout. An 8-channel potentiostat in 0.5 μm CMOS measures 1.5mm × 1.5mm, and consumes 0.5 mW power. The device is expected to serve as a valuable tool for neurophysiological research and implantable neural prostheses.",

author = "Abhishek Bandyopadhyay and Grant Mulliken and Gert Cauwenberghs and Thakor, {Nitish V}",

year = "2002",

language = "English (US)",

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note = "2002 IEEE International Symposium on Circuits and Systems ; Conference date: 26-05-2002 Through 29-05-2002",

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T1 - VLSI potentiostat array for distributed electrochemical neural recording

AU - Bandyopadhyay, Abhishek

AU - Mulliken, Grant

AU - Cauwenberghs, Gert

AU - Thakor, Nitish V

PY - 2002

Y1 - 2002

N2 - A neurochemical sensor system is being developed to spatially sense and process neurotransmitters. This paper reports the design and VLSI implementation of a multi-channel potentiostat that interfaces to a nitric-oxide (NO) sensor array. Picoampere to microampere input currents are range-normalized with programmable gain, and digitized by a bank of current-mode delta-sigma analog-to-digital (A/D) converters. First-order noise shaping and 4,096-fold over-sampling provide high signal-to-noise ratio for the low-frequency NO transients. A shift register scans the buffered decimated delta-sigma outputs in bit-serial forward providing asynchronous sequential readout. An 8-channel potentiostat in 0.5 μm CMOS measures 1.5mm × 1.5mm, and consumes 0.5 mW power. The device is expected to serve as a valuable tool for neurophysiological research and implantable neural prostheses.

AB - A neurochemical sensor system is being developed to spatially sense and process neurotransmitters. This paper reports the design and VLSI implementation of a multi-channel potentiostat that interfaces to a nitric-oxide (NO) sensor array. Picoampere to microampere input currents are range-normalized with programmable gain, and digitized by a bank of current-mode delta-sigma analog-to-digital (A/D) converters. First-order noise shaping and 4,096-fold over-sampling provide high signal-to-noise ratio for the low-frequency NO transients. A shift register scans the buffered decimated delta-sigma outputs in bit-serial forward providing asynchronous sequential readout. An 8-channel potentiostat in 0.5 μm CMOS measures 1.5mm × 1.5mm, and consumes 0.5 mW power. The device is expected to serve as a valuable tool for neurophysiological research and implantable neural prostheses.

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M3 - Conference contribution

AN - SCOPUS:0036292605

VL - 2

BT - Proceedings - IEEE International Symposium on Circuits and Systems

T2 - 2002 IEEE International Symposium on Circuits and Systems

Y2 - 26 May 2002 through 29 May 2002

ER -

VLSI potentiostat array for distributed electrochemical neural recording

Abstract

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