Patent ID: 8331119

Claim:
A power supply circuit for electrical equipment, comprising: a positive supply rail; a negative supply rail to which an inrush current limitation module and a capacitive filtering element are connected, wherein the capacitive filtering element is mounted on a second line having ends respectively connected to the positive rail and to the negative rail; a first n-channel MOSFET transistor and a diode mounted in series on the positive rail, wherein the first transistor has a gate connected to the inrush current limitation module, and wherein the diode comprises a cathode connected to the positive rail upstream of the a link from the positive rail to the secondary line, wherein the diode is an intrinsic diode of a second n-channel MOSFET transistor having a drain connected to the positive rail upstream of the link from the positive rail to the secondary line, and wherein said second transistor has a source connected to a source of the first transistor and a gate connected to a control module; and an additional source of energy having a positive rail with a first branch connected to the gate of the second transistor and a ground rail connected to the sources of the first transistor and of the second transistor.