BJT stands for Bipolar Junction Transistor.
Bipolar Junction Transistor was invented in the year 1947 by John Bardeen, William Shockley, and Walter Houser Brattain.
There are two types of BJT:
1. PNP Bipolar Junction Transistor.
2. NPN Bipolar Junction Transistor.
Transistors are used for amplifying, controlling, and switching of electrical signals and it also use for voltage and current regulations.
