Advertisement

Solid-State Power Amplifiers

  • Denton J. Dailey
Chapter

Abstract

In this chapter we will examine the basic operation of some common power amplifier circuits. Recall that the capacitively coupled, class A amplifiers covered in the last chapter have a maximum theoretical efficiency of 25%. This means that if you were to design a perfect class A amplifier that delivered 10 W to a load, the amplifier itself would dissipate 30 W. Nearly all of this power would be dissipated by the output transistor(s), which would require a large heat sink. Recall also that most of the discrete transistor amplifiers examined in Chap. 3 were common emitter (CE) amplifiers. The output resistance of the CE tends to be high—typically thousands to tens of thousands of ohms. This makes the CE amplifier unsuited for driving a low resistance load, like a loudspeaker which will typically have a resistance of 8 Ω or less.

Keywords

Power Amplifier Voltage Gain Junction Temperature Output Transistor Common Emitter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media, LLC 2013

Authors and Affiliations

  • Denton J. Dailey
    • 1
  1. 1.Butler County Community CollegeButlerUSA

Personalised recommendations