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This paper presents the design and experimental results for a 5x5 tin-oxide gas-sensor array system with particular focus on the employed multiplexed-analog-input 0.35μm CMOS interface circuit chip. This interface circuit reads the electrical response of all the elements of the array in time sharing by means of a solid-state selector, actually exploiting a row-column query technique and provides digital output to a dedicated Lab View ™ software. The proposed system shows very promising properties in terms of data redundancy in order to improve the Signal-to-Noise-Ratio in electronic nosing and for future studies about the influence of gas consumption rate over the metal oxide surface for a 2-D array.
Publication date: 
10 Jun 2007

M Grassit, P Malcovatil, L Francioso, P Siciliano, A Baschirotto

Biblio References: 
Pages: 2023-2026
TRANSDUCERS 2007-2007 International Solid-State Sensors, Actuators and Microsystems Conference