Patent ID: 7689181

Claim:
A circuit arrangement for regulating a DC signal component, comprising: a modulator for frequency converting an influenced input signal received at an input of the modulator; a detector for detecting a DC component value of the influenced input signal and providing the detected DC component value at an output thereof; a comparator having a first input coupled to the output of the detector and configured to receive the detected DC component value thereat, a second input configured to receive a desired reference level, wherein the comparator is configured to generate a control signal at an output thereof as a function of a comparison between the detected DC component value and the reference level; and influence circuitry for influencing the DC component of an input signal as a function of the control signal received from the output of the comparator, thereby forming the influenced input signal at an output thereof, wherein the detector is connected between the output of the influence circuitry and the input of the modulator.