Patent ID: 7529109

Claim:
A driving circuit for switching direct current (DC) power comprising: a DC power generator for outputting DC power; a bridge circuit comprising a plurality of legs each comprising: an upper-bridge switch having an input end coupled to the DC power generator, an output end, and a control end, for conducting power received by the input end to the output end according to a first control signal of a plurality of control signals; and a lower-bridge switch having an input end coupled to the output end of the upper-bridge switch, an output end coupled to ground, and a control end, for conducting power received by the input end to the output end according to a second control signal of the plurality of control signals; a control signal generator for generating the plurality of control signals for controlling each upper-bridge switch and lower-bridge switch of the bridge circuit; and an active clamping module coupled to each upper-bridge switch of the plurality of legs of the bridge circuit for clamping voltages of input ends of the upper-bridge switches.