Basic Electronics

4

BJT Fundamentals

Outline

 

4-1 Introduction

4-2 Formation of p–n–p and n–p–n Junctions

4-3 Transistor Mechanism

4-4 Energy Band Diagrams

4-5 Transistor Current Components

4-6 CE, CB, CC Configurations

4-7 Expression for Current Gain

4-8 Transistor Characteristics

4-9 Operating Point and the Concept of Load Line

4-10 Early Effect

Objectives

This chapter introduces one of the most important semiconductor devices, the bipolar junction transistor. This is followed by a discussion on the formation of the p–n–p and n–p–n junctions. Transistor mechanism and energy band diagrams are examined in detail. Transistor current components for p–n–p and n–p–n transistors are provided, and subsequently the CE, CB, CC configurations of transistors are explained. ...