Patent ID: 6967520
Filing Date: 2005-11-22
Classification: H02M,H03K,Y02B

Abstract:
1. A gate driving circuit comprising: a direct current power source; a driving signal source for outputting a high-level or low-level signal; a main switch device, having a gate terminal in which the signal outputted from the driving signal source is inputted, for controlling a conduction state between a source terminal and a drain terminal in correspondence with a level of the signal; a load energized when the conduction state between the source terminal and the drain terminal becomes conductive; reverse current blocking means, connected between the driving signal source and the gate terminal, for outputting a signal only in a direction from the driving signal source to the gate terminal; and regenerative means for regenerating a part of power outputted by the driving signal source in the direct current power source, the regenerative means being connected between the gate terminal and a high potential side of the direct current power source, and the regenerative means becoming conductive when the conduction state between the source terminal and the drain terminal is non-conductive, wherein a gate-source threshold voltage to make the conduction state between the source terminal and the drain terminal conductive is higher than an output voltage of the direct current power source, and wherein the regenerative means includes a MOSFET.