Circuit arrangement for power control of a valve spool

There is described a circuit arrangement for detecting the resistance of a coil of a solenoid valve with at least one solenoid valve (MV1 to MV n) with at least one to be driven valve spool, a current source (Iconst) for impressing a current into the at least one valve coil and generating a voltage drop at the at least a valve spool, and an evaluation circuit for outputting the voltage drop generated at the at least one valve coil as an output signal (Vmeas) of the circuit arrangement.