A high-precision wide-range front-end for resistive gas sensors arrays
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Abstract In this paper, a high-precision wide-range electronic front-end for resistive gas sensors is described. A flexible continuous time trans-resistance stage is followed by a switched capacitor incremental ADC. A smart DSP allows to reconfigure the front-end in order to achieve a resolution of 0.1% for a resistance ranging in [100 Ω–10 MΩ].
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