三极管饱和区集电结正偏为何集电极电流没倒流，请说的详细些，很多人答过，可就是没说明白的 三极管饱和时集电极为什么正偏？
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Ic倒流？从B流向C还是从E流向C（以NPN管说）？
导通的三极管，电流方向只有两个，即NPN管由C、B流向E，PNP管的由E流向C、B。另外说，集电结正偏说法是不确切的，这只是电位高低的比较，是三极管饱和的现象。
要知道电流只能由电源正极出发经外电路回到电源负极。参考下图，就知道不会倒流了。
饱和状态并不是偏置电压的问题，而是极电结处于饱和击穿状态，集电结正偏说法是不确切的，其实是击穿状态。
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