This allows the gate to regain control in order to turn the device on at some controllable time after it has again entered the forward blocking state 这样，当晶闸管重新处于正向阻断状态（器件处于可控时间） ，使得门极变得可控。
3.
The thyristor can be trigged into the on - state by applying a pulse of positive gate current for a short duration provided that the device is in its forward blocking state 如果是处于正向阻断状态，只要在门极提供一个短暂的正脉冲，晶闸管就会导通。
