Vol. 120, Issue 9, September 2010, pp.107-118

Noise Feature Analysis in Pulse Temperature Modulated MOS Gas Sensors

¹Nimisha Dutta and ^1,2Manabendra Bhuyan

¹Dept. of Electronics and Communication Engineering

Tezpur University, Napaam, Dist-Sonitpur, Assam, Pin-784028

E-mail: ¹nimisha.dutta0@gmail.com, ²manab@tezu.ernet.in

Received: 26 June 2010   /Accepted: 14 September 2010   /Published: 27 September 2010

Abstract: MOS gas sensors are always affected by noise mostly due to thermoelectric and environmental reasons. Operating the sensor using modulating type of temperature profile becomes attractive due to its higher discriminating power, however the immunity of the sensor to noise under such conditions has not been attended so far. Experimental validation of noise immunity of three MOS gas sensor under pulse modulated heater voltage has been performed. Dependency of noise of MOS gas sensor on the pulse modulated heater voltage has been verified by FFT, probability distribution function (PDF) and noise histogram analysis.

Keywords: Electronic Nose, Gas-sensors, Noise analysis

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