A
transistor has three regions
The
emitter : This is heavily doped. Its function is to emit electrons or
holes into the transistor.
The
base: It is in between the collector and emitter. It is lightly
doped. It passes most of the charge carriers from the emitter to the
collector.
The
collector: It collects the charge carriers from the emitter. It
doping is less than emitter but higher than that of base.
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