Patent ID: 8854020

Claim:
A circuit for providing at least first and second D.C. power supply voltages from a D.C. voltage provided by a first switched-mode converter between a first terminal and a second terminal, wherein: a second reversible buck-type switched-mode converter is powered with said D.C. voltage; a capacitive dividing bridge connects said first and second terminals, a midpoint of the capacitive dividing bridge corresponding to an output of the second converter and defining a third terminal for providing an intermediary D.C. potential, wherein the second converter is configured to provide the intermediary D.C. potential at the third terminal; and said first and second D.C. power supply voltages are respectively sampled between the first and third terminals and between the third and second terminals, wherein the second switched-mode converter comprises a first switching device connected between the first terminal and a junction point, a second switching device connected between the junction point and the second terminal, and an inductor directly connected between the junction point and the third terminal, and wherein the second switched-mode converter is configured to provide said first D.C. power supply voltage to a first load connected between the first and third terminals and to provide said second D.C. power supply voltage to a second load connected between the third and second terminals.