A mixed-mode interface circuit for gas sensor control and measure

A mixed-mode interface circuit for monolithically integrated gas sensor arrays has been developed. Circuitry includes the heater driver for the temperature control, interface electronics for inspection of up to four sensors array and interface logic for smart control. Because of its characteristics as robustness, small, size, low price and future capabilities with the adequate signal processing the system composed by the sensor and the application specific integrated circuit would be able to cover most of today markets considered for gas sensors.