题目内容

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. ()

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The linear relation between collector current and collector– emitter voltage is called a ______ and can be used to visualize the bias condition and operating mode of the transistor

A. Kirchhoff line
B. load line
C. operation line
D. magic line

For the saturation 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

Distribution of minority carriers in the base region is exactly linear. ()

In reverse-active, the gradient in the minority carrier electron concentration in the base is in the opposite direction compared with the forward-active mode, so the emitter and collector currents will change direction. ()