Patent ID: 7733071
Filing Date: 2010-06-08
Classification: G05F

Abstract:
1. A device for smoothing a load current supplied to a load by a controllable current sink connected in parallel to the load and to a peak detector, wherein a measured voltage proportional to the load current is derived from the load current supplied to the load; its maximum value is determined by means of the peak detector; and the voltage-controlled current sink is controlled with the difference between the maximum value and the measured voltage in such a manner that the sum of the compensation current flowing through the current sink and the load current flowing through the load is substantially constant, wherein the maximum value of the measured voltage is limited to a predetermined value by a voltage limiter; wherein the mean value of the compensation current of the current sink and the temperature of the current sink are determined, and the limitation of the maximum value is determined dependent upon the latter, so that, in the event of an overload, the filter effect is correspondingly limited and attenuated.