Telecommunication Circuit Design - Second Edition.pdf - Electrical and Electronical - X-files

Telecommunication Circuit Design, Second Edition. Patrick D. van der Puije

ISBNs: 0-471-41542-1 (Hardback); 0-471-22153-8 (Electronic)

Telecommunication

Circuit Design

Telecommunication

Circuit Design

Second Edition

Patrick D. van der Puije

A Wiley-Interscience Publication

JOHN WILEY & SONS, INC.

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ISBN 0-471-22153-8

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CONTENTS

Preface

xiii

Chapter 1 The History ofTelecommunications

1.1 Introduction 1

1.2 Telecommunication Before the Electric Telegraph 1

1.3 The Electric Telegraph 2

1.4 The Facsimile Machine 4

1.5 The Telephone 6

1.6 Radio 8

1.7 Television 9

1.8 The Growth of Bandwidth and the Digital Revolution 10

1.9 The Internet 11

1.10 The World Wide Web 13

References 15

Bibliography 16

Chapter 2 Amplitude Modulated Radio Transmitter

2.1 Introduction 17

2.2 Amplitude Modulation Theory 18

2.3 System Design 21

2.3.1 Crystal-Controlled Oscillator 22

2.3.2 Frequency Multiplier 22

2.3.3 Amplitude Modulator 22

2.3.4 Audio Ampliﬁer 22

2.3.5 Radio-Frequency Power Ampliﬁer 23

2.3.6 Antenna 23

vi CONTENTS

2.4 Radio Transmitter Oscillator 23

2.4.1 Negative Conductance Oscillator 24

2.4.2 Classical Feedback Theory 26

2.4.3 Sinusoidal Oscillators 28

2.4.4 General Form of the Oscillator 28

2.4.5 Oscillator Design for Maximum Power Output 31

2.4.6 Crystal-Controlled Oscillator 35

2.5 Frequency Multiplier 37

2.5.1 Class-C Ampliﬁer 40

2.5.2 Converting the Class-C Ampliﬁer into a Frequency

Multiplier 40

2.6 Modulator 47

2.6.1 Square-law Modulator 47

2.6.2 Direct Amplitude Modulation Ampliﬁer 49

2.6.3 Four-Quadrant Analog Multiplier 51

2.7 Audio-Frequency Ampliﬁer 54

2.7.1 Basic Device Characteristics 54

2.7.2 Class-A Ampliﬁer 55

2.7.3 Class-B Ampliﬁer 60

2.8 The Radio-Frequency Ampliﬁer 67

2.9 The Antenna 71

2.9.1 Radiation Pattern of an Isolated Dipole 72

2.9.2 Monopole or Half-Dipole 72

2.9.3 Field Patterns for a Vertical Grounded

Antenna 74

2.10 Classiﬁcation of Amplitude Modulated Radio-Frequency

Bands 75

References 76

Problems 76

Chapter 3 The Amplitude Modulated Radio Receiver

3.1 Introduction 79

3.2 The Basic Receiver: System Design 79

3.3 The Superheterodyne Receiver: System Design 82

3.4 Components of the Superheterodyne Receiver 85

3.4.1 Receiver Antenna 85

3.4.2 Low-Power Radio-Frequency Ampliﬁer 86

3.4.3 Frequency Changer or Mixer 90

3.4.4 Intermediate-Frequency Stage 99

3.4.5 Automatic Gain Control 101

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