题目内容

We want as many electrons as possible to reach the collector without recombining with any majority carrier holes in the base. Therefore, the width of the base needs to be large compared with the minority carrier diffusion length. ()

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For the forward-active operating mode of an npn bipolar transistor (common base), the B-E junction and B-C junction are and ___ biased, respectively.

A. forward; forward
B. forward; reverse
C. reverse; forward
D. reverse; reverse

Ideally, the minority carrier electron concentration in the base is a linear function of distance, which implies ___________.

A. enough diffusion
B. no diffusion
C. enough recombination
D. no recombination

In cutoff mode, all currents in the transistor are very small. ()

For an npn bipolar transistor in a common-emitter configuration with an input of sinusoidal signal voltage, the sinusoidal voltages in the collector–emitter portion of the circuit are larger than the signal input voltage, so that the circuit has produced a voltage gain in the time-varying signals. ()