Short Notes on Bipolar transistors

NPN Transistor

Placing P-type semiconductor between two N-type semiconductor is NPN transistor




It operates by a small current flow from the emitter to base.current

will not flow from the emitter to the collector until a small voltage

(at least 0.7 volts) is applied to the base.




Collector current is much larger than the base current.


SYMBOL




PNP