Bipolar Junction Transistors

Dear students

         In the last class we discussed an introduction to transistors. In fact we made an introduction to Bipolar Junction Transistors (BJT). The name BJT has been used for this type of transistors, because of having two polarity charge carriers , viz., electrons and holes, corresponding to npn and pnp transistors.

        There is another type of transistors called , Field Effect Transistors (FET), which is not discussed here. So far we have used the word transistor for BJT alone, and will continue the same, till otherwise FET has to be mentioned. 

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