Chapter 8

Field Effect Transistors

Structure of a JFET

Chapter Outline

The concepts introduced in this chapter are:

  • Comparison of a FET with a BJT
  • Construction and characteristics of various types of FETs
  • Small signal model of a FET
  • Biasing circuits of a FET
  • FET as a voltage variable resistor
8.1 INTRODUCTION

Field-effect transistor (FET) is a popular active device of electronics which is widely used for amplification as well as switching similar to the bipolar junction transistor (BJT). The operation of this device depends on the control of flow of current by the virtue of electric field. This is a unipolar device, that is, the operation ...

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