题目内容
A junction transistor in the common-emitter mode can act as a resistance amplifier.
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The small alternating voltage is applied to the base-emitter circuit and causes large changes of base current which produce small changes in the collector current flowing through the load.
For transistor action to take place the base-emitter junction must always be forward straight line.
When the base current increases, large proportionate increases occur in the collector current.
A decrease of base current causes a large increase of collector-emitter voltage.
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