| 摘要 |
PROBLEM TO BE SOLVED: To break down a trade-off relation between a serge voltage and a turn-off loss existing in a transitional stage in which a transistor is turned off in a circuit for driving the transistor. SOLUTION: A driving circuit 10 is provided with an adjustment circuit 20 for adjusting the resistance value of the gate resistance of a transistor 30. An adjustment circuit 20 adjusts the resistance value of the gate resistance of the transistor gate 30 based on the current value of the negative gate currents Ig(-) of the transistor 30. Thus, the driving circuit 10 rapidly varies drain currents at the beginning of the transitional stage when the transistor 30 is turned off, and slowly varies the drain currents in the end of the transitional stage when the transistor 30 is turned off. COPYRIGHT: (C)2008,JPO&INPIT
|
