Title :
Flexible high-accuracy wide-range gas sensor interface for portable environmental nosing purpose
Author :
Grassi, M. ; Malcovati, P. ; Baschirotto, A.
Author_Institution :
Dept. of Electr. Eng., Pavia Univ., Italy
Abstract :
In this paper, we present a flexible high-precision wide-range front-end for resistive sensors. The output of a programmable continuous-time transresistance stage is processed by a differential switched-capacitor incremental A/D converter. A digital signal processor reconfigures the interface leading to a resolution of 0.1% over a range of 5 decades, as required by pattern recognition algorithms for sensors arrays in environmental nosing applications. Particular care has been taken in reducing the power consumption.
Keywords :
analogue-digital conversion; digital signal processing chips; electronic noses; operational amplifiers; portable instruments; switched capacitor networks; CMOS; differential switched-capacitor incremental A/D converter; digital signal processor; environmental monitoring; flexible high-precision front-end; gas sensor interface; high-accuracy wide-range gas sensor; logarithmic compression; operational amplifier; pattern recognition algorithms; portable environmental nosing; power consumption reduction; programmable continuous-time transresistance stage; resistive sensors; sensors arrays; transresistance amplifier; Diodes; Electric resistance; Electrical resistance measurement; Gas detectors; Pattern recognition; Sensor arrays; Signal processing algorithms; Signal resolution; Temperature sensors; Voltage;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465853
