| 摘要 |
A switching circuit is provided with a power field effect transistor having a drain terminal, a source terminal and a gate terminal. A gate resistor is connected to the gate terminal. In response to a turn-on signal, a DC gate voltage is produced between the gate resistor and the source terminal. A circuit branch having a normally-on solid state switching device is connected between the gate resistor and the source terminal. The normally-on solid state switching device is turned off in response to the turn-on signal, and enabled in the absence of the turn-on signal to improve the turnoff characteristics of the power field effect transistor.
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