A high-precision wide-range front-end for resistive gas sensors arrays

M Grassi, P Malcovati, A Baschirotto - Sensors and Actuators B: Chemical, 2005 - Elsevier
M Grassi, P Malcovati, A Baschirotto
Sensors and Actuators B: Chemical, 2005•Elsevier
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 [100Ω–10MΩ].
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 [100Ω–10MΩ].
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