TROUBLE MONITOR DEVICE FOR BRIDGE CIRCUIT

摘要

A trouble monitor device for a bridge circuit which can reliably detect any trouble of a bridge circuit even when multiple troubles occur in a sensor circuit utilizing the bridge circuit. The change of an unbalanced output signal of the bridge circuit is monitored by a first window comparator (WC1) and the undesirable change of a power supply current for amplifying the bridge circuit (11) is monitored by a second window comparator (WC2) so that an output having a logical value "1" representing normality of the bridge circuit can be generated from an AND gate (13) when both monitor outputs are a logical value "1" representing normality.