Patent ID: 8861681

Claim:
A voltage switching system comprising: a plurality of active resonant modules connected to provide a switching voltage output, the plurality of active resonant modules defining a plurality of switching stages, each active resonant module of the plurality of active resonant modules including: a plurality of switching devices configured to operate in open and closed states to produce first and second voltage levels as outputs from a voltage input; first and second capacitors connected to the plurality of switching devices, the first capacitor configured to receive a system discharge energy from the second capacitor during a resonant operating cycle when switching an output voltage from the first voltage level to the second voltage level, wherein the first capacitor is further configured to restore system energy to the second capacitor when switching from the second voltage level to the first voltage level; and a resonant inductor connected in series between the first and second capacitors, the resonant inductor configured to transfer energy to and from the first and second capacitors.