Emitter One of the three regions that form a bipolar
transistor. Under forward
bias of the emitter-base
P-N junction, the emitter
injects minority
carriers (electrons or
holes) into the base
region where they either recombine or diffuse into the
collector. The flow of
minority carriers from
the emitter to the collector is
controlled by the base-emitter
P-N junction, thus giving
rise to signal amplification.
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