Chapter 12

Power Amplifiers

Series-fed class A amplifier

Chapter Outline

The concepts introduced in this chapter are:

  • Distortion due to harmonics
  • Analysis of different types of class A amplifiers
  • Class B amplifier analysis with minimum harmonic distortion
  • Class AB amplifier configuration
  • Different types of tuned amplifiers
  • Instability in tuned amplifiers
12.1 INTRODUCTION

An amplifying system consists of several stages in cascade. The input and intermediate stages amplify small signal excitations to a value large enough to drive the final device. The output stage feeds a transducer such as a cathode-ray oscilloscope, a loudspeaker, or ...

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