BJTn
BJTn refers to a bipolar junction transistor of the NPN type, one of the two complementary BJTs (the other being PNP). It is a three-terminal semiconductor device used for amplification and switching in electronic circuits.
Construction: It comprises three doped regions: an n-type emitter, a p-type base, and an n-type collector. The
Operation: With forward bias of the emitter-base junction, a small base current Ib modulates a much larger
Electrical characteristics: Key parameters include current gain β, collector-emitter voltage Vce, and power dissipation. Silicon devices typically
Applications: BJTn devices are used as linear amplifiers in audio and RF circuits, as switches in digital
Symbol: The schematic symbol shows three terminals labeled E, B, and C, with the emitter arrow pointing