raction of these bine with electrons in the base, but most diffuse to the collector-base depletion layer where they are whisked away into the collector by the high field in the depletion layer. ? Injection always works both ways, though do different extents, and there is a current of electrons injected back into the emitter, which is proportional to the forward current of holes. ? From the collector there is a fairly constant leakage current to the base of electrons. The variation of the carrier densities ? The distribution of the minority density in the base is nearly a straight line, because the bination of carriers in the base is too small an effect to be evident. If it is shown, the density in the base will fall a little more steeply near the emitter than near the collector.
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