Design and modeling of a low-power multi-channel integrated circuit for infrared gas recognition

Authors:
S. Sutula;C. Ferrer;F. Serra-Graells
Affiliations:
IMB-CNM (CSIC), Campus UAB Bellaterra, 08193 Cerdanyola del Vallès, Spain;IMB-CNM (CSIC), Campus UAB Bellaterra, 08193 Cerdanyola del Vallès, Spain;IMB-CNM (CSIC), Campus UAB Bellaterra, 08193 Cerdanyola del Vallès, Spain
Venue:
Microprocessors & Microsystems
Year:
2012

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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 340x880@mm channel integrated in 0.35@mm CMOS technology reporting good agreement with electrical and higher level simulations.