Patent ID: 8125806

Claim:
A multi-stage switching power supply comprising; an overvoltage protection circuit connected to a low voltage DC power source; a first switching stage comprising a boost stage, wherein the boost stage is connected to said overvoltage protection circuit and a control signal and said boost stage is capable of receiving a power signal from said overvoltage protection circuit, amplifying the voltage of the power signal, and outputting a boosted power signal; a second switching stage comprising an inverter stage, wherein the inverter stage is connected to a boosted power signal and at least one control signal and said inverter stage is capable of outputting a waveform power signal, wherein said waveform power signal's wave characteristics depend on said at least one control signal; a controller capable of outputting at least a first control signal for controlling said inverter stage, and a control signal for controlling said boost stage; and wherein said control signals comprise counter-synchronized control signals.