Abstract
The design and high-level modeling of a multi-channel integrated circuit for infrared gas recognition suitable for low-power consumption are presented. The thermal compensation and independent programmability methods are used in all the main channel stages: sensor biasing, high-pass filtering and pre-amplification, blind cancellation, lock-in demodulation and A/D conversion. CMOS transistor subthreshold operation and circuit reuse techniques are widely applied in order to obtain a low-power and compact channel realization. Experimental results are presented for a 340×880μm channel integrated in 0.35μm CMOS technology reporting good agreement with electrical and higher level simulations.
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