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Concept of transistor

Parminder K.
04/02/2017 0 0

Introduction to transistor

Transistor is basic of modern electronics. 

We have two types of transistors.

  • Bipolar junction transistor
  • Unipolar junction transistor

Transistor is a device made of two words. 

Transfer + resistor. 

So it means it is a device that transfers current from low resistance circuit to high resistance circuit. 

Now, what do u mean by low resistance and high resistance circuits??? 

Remember, when you read semiconductor devices first time then a very intereting topic you must have learnt, BIASING. 

Biasing is doing favor to someone or simply in one word it is partiality. So what type of partiality are we doing?? So simple, we are giving the same thing to a terminal that it already has in abundance.

Yes, a transistor is always a three legged device, named emitter, base and collector. 

Now if a talk about BJT (BIPOLAR JUNCTION TRANSISTOR ) so it has two types

  • NPN
  • PNP

So, in any ckt there are two main blocks; input and output. So according to the definition we have to do forward biasing in the input block an reverse biasing for output block. 

 

Gud luck

It is only basic definition of transistor. For further Information, will update soon. Till that enjoy. 

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