NPN TransistorsA NPN transistor is comprised of two large pieces of N-Type material with a very small piece of P-Typematerial sandwiched in-between. The small piece of P-Type material is the base of the transistor. It caneither connect the two outer pieces of N-Type material together or not. The base voltage level controls the transistor and allows current between the collector and the emitter. Ifan increasing voltage level is placed on the base of the transistor that is higher than the voltage on theemitter, the transistor's barrier voltage will be reached. When the barrier voltage is reached there will be
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Bipolar junction transistor, emitter voltage levels, barrier voltage