What is a transistor?


Transistor is a three terminal semiconductor device. The two main function of the transistor is to amplify or switch electronic signal or electric current. 

“Trans” means transfer property and “istor” means resistance property. It means it switches with some resistance or control.  

It is the fundamental building block of the modern electronics. Transistor was invented by John Bardeen, Walter Brattain, and William Shockley in the Bell Laboratory in the year 1947.

Advantage of Transistor over vacuum tube: