Measuring bridge circuit in four- or multi-conductor technology with compensation of the line influences

摘要

The circuit has at least one strain gauge connected to a measurement amplifier circuit and an internal half bridge via 4 connecting lines, a compensation amplifier (V1) for regulating the voltage drop on a first supply line (2) and a differential amplifier (V4) between a second supply line (4) and a measurement line (4') whose output voltage is added to the constant supply voltage component at an expansion quarter bridge (8) or the strain gauge quarter bridge (1).