The first Transistor was invented in 1948 by W.H. Brattain and J. Bardeen; transistor has gained good use, they are used in almost most electronic applications. Though a transistor is only slightly more than 70 years old, and it has replaced old vacuum tubes in almost all applications. In this post, we will cover What is BJT (Bipolar Junction Transistor) Step by Step, we will also learn working of BJT as an Amplifier and Switch and their Applications. Read More