What is transistor? | how it works?

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What is transistor? | how it works?

 

HELLO FRIENDS.

 

Transistor

 


A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power.

It is composed of P- type & N- type semiconductive materials with at least three terminals for connection to an external circuit.

A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal.

 

The three legs of transistor are

Collector

Base

Emitter

As shown below

 


But in different transistors the pin order changes, and to know pinouts, search for pinouts of particular transistor.

 

There are two basic types In transistor.

NPN & PNP.

The image shows the structure & symbol of both NPN & PNP transistor.

 


You can see the arrow on symbols to identify the NPN & PNP transistor.

 

THERE ARE MANY SHAPE & SIZES OF TRANSISTOR, AVAILABLE IN MARKET, AS SHOWN BELOW.

 




And we use (BC547, NPN) & (BC548, PNP) Transistor commonly In our projects.

 

Hey it’s  TECH BECK.



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