A complete front-end system for resistive gas sensor array is presented. The system is composed by a substrate temperature control circuit and by a read-out circuit. The temperature control allows maintaining a 100 C temperature gradient selected in the temperature range [150 C-350 C] on the array of sensor. The gas sensor read-out circuit, which acts like a resistance-to-period converter, is suitable to be interfaced to a microcontroller in order to achieve a resolution error lower than 0.5% for a resistance ranging in (300kohm-300Mohm]. The full device, including 8 read-out channels and 2 temperature control systems, is designed in a standard 0.35um CMOS technology. The die area is 1.8mm2 with a total power consumption of 30mW from a single 3.3V supply voltage.
A complete front-end system read-out and temperature control for resistive gas sensor array
Malfatti, Mattia;Perenzoni, Matteo;Simoni, Andrea;Lorenzelli, Leandro;Baschirotto, Andrea
2005-01-01
Abstract
A complete front-end system for resistive gas sensor array is presented. The system is composed by a substrate temperature control circuit and by a read-out circuit. The temperature control allows maintaining a 100 C temperature gradient selected in the temperature range [150 C-350 C] on the array of sensor. The gas sensor read-out circuit, which acts like a resistance-to-period converter, is suitable to be interfaced to a microcontroller in order to achieve a resolution error lower than 0.5% for a resistance ranging in (300kohm-300Mohm]. The full device, including 8 read-out channels and 2 temperature control systems, is designed in a standard 0.35um CMOS technology. The die area is 1.8mm2 with a total power consumption of 30mW from a single 3.3V supply voltage.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
