The Structure and Working Principle of a Bipolar Junction Transistor (BJT)

Abstract

We studied bipolar junction transistors. We will see that the bipolar junction transistor, often referred to by its short name, transistor, actually functions as a current-controlled current source. We will also see that in the current generation of bipolar junction transistors, both majority and minority carriers are involved. For this reason, they gave this name to this type of transistor. In order to get enough information about this part, in the first two parts we will examine the construction and working method of the transistor. After that, we dedicate sections to how the transistor is placed in different combinations and the characteristics of the transistor in each combination.