Transcription: The topic for this lesson is the bipolar junction transistor as a switch. In the left-hand side of the figure, the transistor is in the cutoff region since the base-emitter junction is not forward biased. There is, ideally, an open condition between the collector and emitter as shown in the equivalent switch diagram. In the right-hand side of the figure, the transistor is in the saturation region as the base-emitter junction and the base-collector junction are forward biased in the established base current is large enough to cause the collector current to reach its saturation value. Ideally, t ...
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