题目内容
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. ()
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We are interested in calculating currents in the bipolar transistor that, as in the simple pn junction, are determined by the diffusion of ________.
In cutoff, the minority carrier concentrations are zero at each space charge edge. The base is narrow compared with the minority carrier diffusion length. All minority carriers are swept out of the base region. ()
In saturation, excess minority carriers exist at the edge of each space charge region. No gradient will exist in the minority carrier electron concentration in the base.
The common-base current gain is defined as the ratio of ______ current to _____ current.
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