transistors
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Two major functions of a transistor
to act as an electronic switch or amplifier
The Two PN junctions of a Transistor
Base Emitter, base collector
Current flow through a transistor
Current flows through the emitter, into the base, and out of the collector.
Emitter of an NPN transistor
Heavily Doped, N material
Emitter of a PNP transistor
Heavily Doped, P Material
Base of a PNP transistor
Lightly Doped N Material
Base of an NPN transistor
Lightly Doped, P material
Collector of a PNP transistor
Moderately Doped, P Material
Collector of an NPN transistor
Moderately doped, N material