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Gate driving circuit

  • US 20040075486A1
  • Filed: 10/14/2003
  • Published: 04/22/2004
  • Est. Priority Date: 10/21/2002
  • Status: Active Grant
First Claim
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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 a conductive state;

    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, connected between the gate terminal and a high potential side of the direct current power source, which becomes the conductive state when the conduction state between the source terminal and the drain terminal is a non-conductive state, wherein a gate-source threshold voltage to obtain the conductive state between the source terminal and the drain terminal is higher than an output voltage of the direct current power source.

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