READ-OUT CIRCUIT AND METHOD FOR READING OUT LARGE-ARRAY RESISTIVE SENSORS

摘要

Read-out circuit and method for reading out a large array of resistive sensors having m column connection lines and n row connection lines. Each of a plurality of resistive sensors (Rmn) is connected between one of the m column connection lines and one of the n row connection lines. Measuring a sensor value of a single one of the resistive sensors (Rmn) is accomplished by connecting the measurement circuit (5) to the row connection line associated with the single one resistive sensor, grounding all column connection lines and measuring a first sensor value, connecting a column connection line associated with the single one resistive sensor to a supply voltage and measuring a second sensor value, and determining the sensor value of the single one resistive sensor by subtracting the first sensor value and second sensor value.