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An I2C programmable 0.35µm CMOS System-on-Chip (SoC) for bi-dimensional gas-sensor arrays providing extended dynamic range read-out with suitable embedded A/D converter and digitally controlled row temperature has been developed. The SoC also features low-power consumption, low-cost production, wide re-configurability and thus large scale compliance with several types of micro-sensors, achieving maximum...
A reconfigurable, low-cost, wide-dynamic-range, 0.35μm CMOS read-out ASIC for resistive bi-dimensional Metal-Oxide gas-sensor grids, providing local temperature regulation, has been developed. The MOX grid read-out circuit is based on a resistance to digital converter plus suitable low insertion loss analog multiplexers, delivering up to 380 possible measurement configurations for a 5×5 sensing device...
In this paper, we present the design and the characterization of a wide-dynamic-range interface circuit for resistive gas-sensors able to operate without calibration. The circuit is based on resistance-to-frequency conversion, which guarantees low complexity. The state-of-the-art of this measurement method has been improved first by separating the resistance value controlled oscillator circuit (RCO)...
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