# Chapter 3 Solid-state devices and valves

Revise the previous chapter (Please be aware that the revision section for Chapter 2 is quite extensive. It comprises 12 sections and around 100 questions and may take you some time to complete. Opens in a new window)

Introduction

The Silicon (Si) atom

The Germanium (Ge) atom

Semiconductor materials

The PN junction

The zener diode

Variable-capacitance diode

NPN PNP transistors

Field-effect transistor (FET)

Applications of solid-state devices

The transistor as a small-signal amplifier

Power amplifiers

The transistor as a switch

The transistor as a tuned amplifier

The transistor as an oscillator

The transistor as a mixer

Integrated circuits (IC's)

Introduction to valves

Index | Next