三极管倒置时发射极与集电极对调使用,倒置时的三极管也同样具有三种工作状态,但是等效集电极电流(I_E)与基极电流的比值即β值要比正接时小得多,所以要使倒置的三极管进入饱和区,所需的基极驱动电流要比正接时大得多,但是倒置时的管压降要比正接时的小。 When the transistor is inverted, the emitter and the collector are used in opposite directions. The transistor in the inverted state also has three operating states, but the ratio of the equivalent collector current (I_E) to the base current, ie, the value of β, is much smaller than that of the direct current. To bring the inverted transistor into saturation, the required base drive current is much larger than the positive one, but the tube voltage drop when inverted is smaller than the positive one.