Patent ID: 8749094

Claim:
A power supply adapted for supplying electrical power to a load, the power supply comprising: at least one powered full bridge circuit, wherein the powered full bridge circuit is adapted for being powered by a direct current voltage supply, wherein the full bridge circuit comprises a first output connection, wherein the full bridge circuit comprises a first switch that controls the application of electrical power to the first output connection, at least one floating full bridge circuit, wherein each floating full bridge circuit comprises a capacitor storing a charge, wherein the capacitor supplies the charge to power the floating full bridge circuit, wherein each floating full bridge circuit comprises a second output connection, wherein each floating full bridge circuit comprises a second switch that controls the application of electrical power to the second output connection, a stack of bridge circuits comprising the at least one powered full bridge circuit and the at least one floating full bridge circuit, wherein the second output connection and first output connection are connected in series, wherein the stack has a third output connection, a passive filter for averaging the voltage across the third output connection, wherein the passive filter is connected to the third output connection, a load connector adapted for connecting the passive filter to the load, a modulator adapted for modulating the first switch and the second switch such that the charge of the capacitor is controlled while electrical power is being supplied to or extracted from the load.