Gate circuit for insulated gate semiconductor device
AssigneeKabushiki Kaisha Toshiba
InventorKohsaku Ichikawa
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Abstract
The present invention is composed of: positive and negative control power sources P and N, first and second semiconductor device groups A and B in which a plurality of semiconductor devices 12 and 13 and also 15 and 16 are series-connected to these positive and negative control power sources P and N, switching signal source 17 that supplies ON/OFF control signals to semiconductor devices 12 and 13 and also 15 and 16 of these first and second semiconductor device groups A and B, and delay circuits 18 and 19 that delay for a specified time the ON/OFF control signals supplied to any one of semiconductor devices 12 and 13 and also 15 and 16 of first or second semiconductor device groups A and B from this switching signal source 17.
Claims14
A gate circuit for controlling an insulated gate semiconductor device having a gate terminal, comprising:
- positive and negative control power source terminals;
- first and second semiconductor device groups, in which a plurality of semiconductor devices are connected in series between said positive and negative control power source terminals;
- a switching signal source for supplying ON/OFF control signals to said semiconductor devices of the first and second semiconductor device groups;
- and
- delay circuits for delaying said ON/OFF control signals supplied from said switching signal source to one or other of said first or second semiconductor device groups during a predetermined time,
- wherein a mid-point of said first semiconductor device group is connected to said gate terminal of said insulated gate semiconductor device,
- respective collectors of said first semiconductor device group are connected to said positive and negative control power source terminals via respective resistors, and
- a central connecting point of said second semiconductor device group is connected to said gate terminal of said insulated gate semiconductor device.
Dependencies are inferred from the claim text.