Bipolar Junction Transitor BJT Types



BJT Types
1)NPN and 
2)PNP.
NPN: a small input current and a positive voltage applied @ its base (with VB>VE)
allows a large current to flow from collector to emitter.
– PNP: a small output current and a negative voltage @ its base (with VB<VE) allows a
much larger current to flow from emitter to collector.


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