INTEGRATEDINTERFACECIRCUITWITH MULTIPLEXEDINPUTAND DIGITAL OUTPUTFORA5x5SnO2GAS-SENSORMATRIX

This paperpresents thedesign andexperimental results for a 5x5tin-oxide gas-sensorarray systemwithparticular focus on theemployed multiplexed-analog-input 0.35(pm CMOS interface circuit chip. Thisinterface circuit reads theelectrical responseofalltheelements ofthearrayintimesharing by means ofa solid-state selector, actually exploiting a row-column query technique andprovides digital output toa dedicated LabViewTM software. Theproposed systemshowsverypromising properties in termsofdataredundancy inorder toimprove theSignal-to-Noise-Ratio inelectronic nosing andfor future studies about theinfluence ofgasconsumption rate overthemetal oxide surface for a2-Darray. -- Keywords: 5x5metal oxide sensorarray,Microfabrication technology, Integrated interface, ASIC.