Title :
A frequency-based signature gas identification circuit for SnO2 gas sensors
Author :
Ng, Kwan Ting ; Boussaid, Farid ; Bermak, Amine
Author_Institution :
Sch. of Electr., Electron. & Comput. Eng., Univ. of Western Australia, Perth, WA, Australia
fDate :
May 30 2010-June 2 2010
Abstract :
This paper presents a gas identification circuit for tin oxide (SnO2) gas sensors. The proposed circuit uses 2 gas sensors with different characteristics to achieve gas identification. A spike train is generated during operation, with the frequency of spike occurrence being gas dependent but concentration invariant. As a result, the spike firing frequency can be used to achieve gas identification. The calibration of this readout technique requires only a single exposure to the target gases to extract the sensor resistances. The low complexity processing is suitable for on-chip implementation. The functionality of this circuit has been validated with real data from our in-house fabricated sensors.
Keywords :
gas sensors; identification; tin compounds; SnO2; frequency-based signature gas identification circuit; gas sensor; sensor resistances; spike firing frequency; tin oxide; Circuits; Costs; Fabrication; Frequency; Gas detectors; Gases; Sensor arrays; Sensor phenomena and characterization; Temperature sensors; Tin;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5536952
