Patent ID: 7436236

Claim:
An arrangement for an analog compensation of a DC component in an AC signal, comprising: an estimator adapted to produce an estimate corresponding to the DC component; a compensator adapted to produce a present compensating signal according to the estimate; an adder adapted to add the present compensating signal to the AC signal; and a comparator adapted to continuously compare the present estimate with the present compensating signal, wherein if the difference between the present estimate and the present compensating signal lies outside of a predefined interval, then the comparator triggers the compensator to produce an updated compensating signal according to the present estimate, and to switch from the present compensating signal to the updated compensating signal, and the adder adds the updated compensating signal to the AC signal, and if the difference between the present estimate and the present compensating signal lies within the predefined interval, then the compensator continues to produce the present compensating signal, and the adder adds the present compensating signal to the AC signal.