日志
when emitter follower overload, Vo get truncated
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将射极跟随器组合在共发射极放大电路上来降低输出阻抗的放大电路如图：
输出仿真
In a design of emitter follower, when Rl get smaller to less 1k, the output Vo is truncated.
The schematic as follow:
The simulation result of Pspice as follow:
As I know , in a emitter follower , Vb is fixed according to their resistor value. So, we get :Ve = Vb - Vbe; it's also fixed.
That is to say the Ve has nothing to do with Rl.
But it's not.
Why
