Patent ID: 7492148

Claim:
A circuit configuration for inductive displacement measurement, comprising: a sensor whose inductance changes as a function of a displacement to be measured; and an evaluation circuit coupled to the sensor; wherein: the sensor is coupled between a first operational amplifier and a series connection of a second operational amplifier and a resistor, the first operational amplifier is switchable between a first set of two specified voltages and the second operational amplifier is operable to adjust a specified constant voltage at a connecting point between the resistor and the sensor, an output of the second operational amplifier is connected to an input of a comparator whose other input is switchable between a second set of two specified voltages, and the output signal of the comparator effects the switchover of the second set of two specified voltages and the first set of two specified voltages of the first operational amplifier, and is a measuring output signal of the circuit configuration at the same time.