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It is the fraction of minority carriers injected into the base of a BJT that successfully diffuse across the quasineutral width of the base and enter the collector. Ideally, it should be as close to 1 as possible, for maximum amplification. It is usually represented by alpha_T. alpha_T = I_C/I_E, where I_C is collector current, and I_E is emitter current. For an NPN transistor I_C and I_E are electron current, where as for a PNP they are hole currents.

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16y ago

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