Gate driving circuit
First Claim
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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Accused Products
Abstract
A gate driving circuit having: 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; a reverse current blocking unit, connected between the driving signal source and the gate terminal, to output a signal only in a direction from the driving signal source to the gate terminal; and a regenerative unit, 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. A gate-source threshold voltage to obtain the conductive state between the source terminal and the drain terminal is set higher than an output voltage of the direct current power source.
30 Citations
8 Claims
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1. A gate driving circuit comprising:
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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. - View Dependent Claims (2, 3, 4)
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5. A power source circuit comprising:
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a gate driving circuit having;
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
r generative 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 in the gate driving circuit, 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, and wherein when the conduction state between the source terminal and the drain terminal becomes the conductive state, the output voltage from the direct current power source is supplied to the load. - View Dependent Claims (6, 7, 8)
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Specification