Circuit arrangement.

摘要

The invention relates to a circuit arrangement which is provided with an up-converter (3) which comprises at least inductive means (31) and switching means (32), and with capacitive means (34) which in the operational state are periodically charged with a charging current in dependence on periodic switching of the switching means. The switching means are switched to the conducting state periodically during a substantially constant time ton. According to the invention, the circuit arrangement is provided with detection means (I) for direct detection of the charging current. As a result, a load current which has a sinusoidal shape by good approximation is drawn from a connected AC voltage supply source by the circuit arrangement.