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本帖最后由 超級狗 于 2017-6-19 17:44 编辑
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6 [9 r5 e% H; z* h) M9 SWhat will happen if I bias the collector and emitter of an NPN Transistor inversely?
0 W' F; ?' @/ W2 k1 @0 CIf you use the transistor in reverse, the emitter becomes the collector and the collector becomes the emitter, and its quite simple to see what happens:2 \$ M! q; Q: E" R0 b/ Z1 M3 ]3 L
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- As the collector doping is less than the emitter doping, the hole current in the collector (now the emitter) increases, leading to lower beta.
- The voltage withstand capability goes down, as now the BE junction is reverse biased, and the emitter is not constructed for high withstand voltage.
- The effect of the thin basis remains. For that reason, if the forward beta is high, then the reverse beta will also be higher.: g/ F. v$ S9 c$ y
5 |$ Q+ N4 ]% R+ j% S貼個洋文兒嚇唬人一下!
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