A CMOS single-chip gas recognition circuit for metal oxide gas sensor arrays

Kwan Ting Ng, Farid Boussaid, Amine Bermak

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

This paper presents a CMOS single-chip gas recognition circuit, which encodes sensor array outputs into a unique sequence of spikes with the firing delay mapping the strength of the stimulation across the array. The proposed gas recognition circuit examines the generated spike pattern of relative excitations across the population of sensors and looks for a match within a library of 2-D spatio-temporal spike signatures. Each signature is drift insensitive, concentration invariant and is also a unique characteristic of the target gas. This VLSI friendly approach relies on a simple spatio-temporal code matching instead of existing computationally expensive pattern matching statistical techniques. In addition, it relies on a novel sensor calibration technique that does not require control or prior knowledge of the gas concentration. The proposed gas recognition circuit was implemented in a 0.35 μm CMOS process and characterized using an in-house fabricated 4 × 4 tin oxide gas sensor array. Experimental results show a correct detection rate of 94.9% when the gas sensor array is exposed to propane, ethanol and carbon monoxide.

Original languageEnglish
Article number5766791
Pages (from-to)1569-1580
Number of pages12
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume58
Issue number7
DOIs
Publication statusPublished - 2011
Externally publishedYes

Fingerprint

Sensor arrays
Chemical sensors
Oxides
Networks (circuits)
Metals
Gases
Pattern matching
Sensors
Tin oxides
Propane
Carbon monoxide
Ethanol
Calibration

Keywords

  • 'CMOS technology
  • drift
  • gas recognition
  • gas sensor array
  • tin oxide

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

A CMOS single-chip gas recognition circuit for metal oxide gas sensor arrays. / Ng, Kwan Ting; Boussaid, Farid; Bermak, Amine.

In: IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 58, No. 7, 5766791, 2011, p. 1569-1580.

Research output: Contribution to journalArticle

@article{aee18eb060684de7864895f9e7796a1a,
title = "A CMOS single-chip gas recognition circuit for metal oxide gas sensor arrays",
abstract = "This paper presents a CMOS single-chip gas recognition circuit, which encodes sensor array outputs into a unique sequence of spikes with the firing delay mapping the strength of the stimulation across the array. The proposed gas recognition circuit examines the generated spike pattern of relative excitations across the population of sensors and looks for a match within a library of 2-D spatio-temporal spike signatures. Each signature is drift insensitive, concentration invariant and is also a unique characteristic of the target gas. This VLSI friendly approach relies on a simple spatio-temporal code matching instead of existing computationally expensive pattern matching statistical techniques. In addition, it relies on a novel sensor calibration technique that does not require control or prior knowledge of the gas concentration. The proposed gas recognition circuit was implemented in a 0.35 μm CMOS process and characterized using an in-house fabricated 4 × 4 tin oxide gas sensor array. Experimental results show a correct detection rate of 94.9{\%} when the gas sensor array is exposed to propane, ethanol and carbon monoxide.",
keywords = "'CMOS technology, drift, gas recognition, gas sensor array, tin oxide",
author = "Ng, {Kwan Ting} and Farid Boussaid and Amine Bermak",
year = "2011",
doi = "10.1109/TCSI.2011.2143090",
language = "English",
volume = "58",
pages = "1569--1580",
journal = "IEEE Transactions on Circuits and Systems I: Regular Papers",
issn = "1549-8328",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "7",

}

TY - JOUR

T1 - A CMOS single-chip gas recognition circuit for metal oxide gas sensor arrays

AU - Ng, Kwan Ting

AU - Boussaid, Farid

AU - Bermak, Amine

PY - 2011

Y1 - 2011

N2 - This paper presents a CMOS single-chip gas recognition circuit, which encodes sensor array outputs into a unique sequence of spikes with the firing delay mapping the strength of the stimulation across the array. The proposed gas recognition circuit examines the generated spike pattern of relative excitations across the population of sensors and looks for a match within a library of 2-D spatio-temporal spike signatures. Each signature is drift insensitive, concentration invariant and is also a unique characteristic of the target gas. This VLSI friendly approach relies on a simple spatio-temporal code matching instead of existing computationally expensive pattern matching statistical techniques. In addition, it relies on a novel sensor calibration technique that does not require control or prior knowledge of the gas concentration. The proposed gas recognition circuit was implemented in a 0.35 μm CMOS process and characterized using an in-house fabricated 4 × 4 tin oxide gas sensor array. Experimental results show a correct detection rate of 94.9% when the gas sensor array is exposed to propane, ethanol and carbon monoxide.

AB - This paper presents a CMOS single-chip gas recognition circuit, which encodes sensor array outputs into a unique sequence of spikes with the firing delay mapping the strength of the stimulation across the array. The proposed gas recognition circuit examines the generated spike pattern of relative excitations across the population of sensors and looks for a match within a library of 2-D spatio-temporal spike signatures. Each signature is drift insensitive, concentration invariant and is also a unique characteristic of the target gas. This VLSI friendly approach relies on a simple spatio-temporal code matching instead of existing computationally expensive pattern matching statistical techniques. In addition, it relies on a novel sensor calibration technique that does not require control or prior knowledge of the gas concentration. The proposed gas recognition circuit was implemented in a 0.35 μm CMOS process and characterized using an in-house fabricated 4 × 4 tin oxide gas sensor array. Experimental results show a correct detection rate of 94.9% when the gas sensor array is exposed to propane, ethanol and carbon monoxide.

KW - 'CMOS technology

KW - drift

KW - gas recognition

KW - gas sensor array

KW - tin oxide

UR - http://www.scopus.com/inward/record.url?scp=79959784353&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79959784353&partnerID=8YFLogxK

U2 - 10.1109/TCSI.2011.2143090

DO - 10.1109/TCSI.2011.2143090

M3 - Article

VL - 58

SP - 1569

EP - 1580

JO - IEEE Transactions on Circuits and Systems I: Regular Papers

JF - IEEE Transactions on Circuits and Systems I: Regular Papers

SN - 1549-8328

IS - 7

M1 - 5766791

ER -