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A complete front-end system read-out and temperature control for resistive gas sensor array | IEEE Conference Publication | IEEE Xplore

A complete front-end system read-out and temperature control for resistive gas sensor array


Abstract:

A complete front-end system for resistive gas sensor array is presented. The system is composed by a substrate temperature control circuit and by a read-out circuit. The ...Show More

Abstract:

A complete front-end system for resistive gas sensor array is presented. The system is composed by a substrate temperature control circuit and by a read-out circuit. The temperature control allows maintaining a 100/spl deg/C temperature gradient selected in the temperature range [150/spl deg/C-350/spl deg/C] on the array of sensor. The gas sensor read-out circuit, which acts like a resistance-to-period converter, is suitable to be interfaced to a microcontroller in order to achieve a resolution error lower than 0.5% for a resistance ranging in (300k/spl Omega/-300M/spl Omega/]. The full device, including 8 read-out channels and 2 temperature control systems, is designed in a standard 0.35/spl mu/m CMOS technology. The die area is 1.8mm/sup 2/ with a total power consumption of 30mW from a single 3.3V supply voltage.
Date of Conference: 02-02 September 2005
Date Added to IEEE Xplore: 31 October 2005
Print ISBN:0-7803-9066-0
Conference Location: Cork, Ireland

References

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