Patent ID: 7170731
Filing Date: 2007-01-30
Classification: G01N

Abstract:
1. A circuit arrangement for operating a sensor, in particular, a circuit arrangement for a linear exhaust gas sensor for an internal combustion engine, comprising: a control circuit that is designed to electrically supply the sensor via a plurality of connecting lines and/or at least to detect one electrical output signal of the sensor in which case one of the connecting lines is routed via one actuatable switching element that is suited to interrupt this line, and in which case the circuit arrangement is designed to detect the potential on at least one of the connecting lines and, should an abnormal potential be detected on this connecting line, to actuate the switching element for interrupting the connecting line, at least one actuatable further switching element that is suitable for connecting a pair of the connecting lines, wherein the circuit arrangement is designed in such a way that it can actuate the connection of these connecting lines should an abnormal potential of this further switching element be detected to break down a potential difference between the connections of the sensor.