题目内容

Current crowding effect means that, more electrons will be injected ___ than _, causing the emitter current to be crowded toward ____.

A. in the center; near the emitter edges; the edges
B. in the center; near the emitter edges; the center
C. near the emitter edges; in the center; the center
D. near the emitter edges; in the center; the edges

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G-P(Gummel-Poon) model is used in uniform doping concentration in the base. ( )

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