Patent ID: 7307384

Claim:
A circuit comprising: a first converter for converting an a.c. voltage into a first d.c. voltage and providing said first d.c. voltage as a first output of said circuit, wherein said first converter has a diode half-bridge having two diodes and a first center terminal, a switch half-bridge having two switches and a second center terminal, a high-frequency inductor and two connections in series with the high-frequency inductor, for connection to a source of a main voltage between the two center terminals, a first d.c. rail being connected to the first center terminal by means of a first diode in the diode half-bridge and an electrically conductive connection and to the second center terminal by means of a first switch in the switch half-bridge and an electrically conductive connection, and a second d.c. rail being connected to the first center terminal by means of a second diode in the diode half-bridge and an electrically conductive connection and to the second center terminal by means of a second switch in the switch half-bridge and an electrically conductive connection; and a second converter for converting the a.c. voltage into a second d.c. voltage and providing said second d.c. voltage as a second output of said circuit to a controller of said first converter for controlling said first converter.