Demystifying Mixed Signal Test Methods (eBook)

Cover 1
Copyright Page 5
Contents 8
Preface 14
CHAPTER 1. Insider’s Guide to Mixed Signal Test 16
1.1 What Is Mixed Signal? 17
1.2 Some Terminology 18
1.3 What Is a Mixed Signal Device? 20
1.4 What Isn’t Mixed Signal? 22
1.5 Example of Mixed Signal Devices 23
1.6 Automatic Test Equipment (ATE) 29
1.7 Comparing Logic Test and Mixed Signal Test 31
1.8 More about the Signal Source 36
1.9 Mixed Signal Test System„Signal Capture 37
1.10 Mixed Signal Test System„Signal Analysis 40
Chapter Review Questions 48
CHAPTER 2. Mixed Signal Test Measurements and Parameters 50
2.1 Signal Analysis Categories 52
2.2 Units of Measurement 52
2.3 Decibel Calculations 53
2.4 Signal Analysis and Test Methods 56
2.5 DC Test Outline 60
2.6 Time Domain Tests 68
2.7 Frequency Domain Tests 72
Chapter Review Questions 76
CHAPTER 3. Signal Generation 78
3.1 Introduction 78
3.2 Signal Source Hardware 80
3.3 Application Example 85
3.4 Signal Data Sets 85
3.5 Periodic Sample Sets 86
3.6 Creating the Signal Data Set 87
3.7 DSP’s Law 91
3.8 Samples per Cycle 94
3.9 The Golden Ratio 95
3.10 Application of DSP’s Law 98
3.11 Sine (X) over X 100
3.12 Source Filters 101
3.13 Source Filter Optimization 102
Chapter Review Questions 103
CHAPTER 4. Signal Capture 104
4.1 Introduction 104
4.2 Digital Signal Capture Hardware 105
4.3 Analog Signal Capture Hardware 107
4.4 The Digitizing Process 108
4.5 Nyquist and Shannon„Theoretical Limits 112
4.6 Sampling Rate and the Frequency Domain 117
4.7 Capturing Periodic Sample Sets 120
4.8 Signal Averaging 124
4.9 Capturing Unique Data Points 125
Chapter Review Questions 129
CHAPTER 5. Frequency Domain Testing and the FFT 130
5.1 Introduction 130
5.2 The Fourier Series 132
5.3 Representing Signal Data 136
5.4 The Inverse Fourier Transform 139
5.5 The Fast Fourier Transform (FFT) 140
5.6 Interpreting Frequency Domain Data 143
5.7 Minimizing Frequency Domain Anomalies 151
5.8 Signal Aliasing 159
Chapter Review Questions 161
CHAPTER 6. DSP Based Testing 162
6.1 Introduction 162
6.2 DSP Algorithm Structure 163
6.3 Math Operations 166
6.4 Data Type Conversions 170
6.5 Signal Analysis Algorithms 171
6.6 DSP Measurement Applications 173
6.7 FFT Algorithms 177
6.8 Harmonic Distortion Test Sequence 184
CHAPTER 7. Section 192
7.1 Introduction 192
7.2 DAC Overview 196
7.3 DC Test Overview 196
7.4 Linearity Test Overview 202
7.5 AC Test Overview 211
7.6 Dynamic Performance Tests 216
Chapter Review Questions 221
CHAPTER 8. Testing Analog-to-Digital Converters 222
8.1 Introduction 222
8.2 ADC Overview 225
8.3 DC Test Overview 225
8.4 Linearity Test Overview 230
8.5 Missing Codes 236
8.6 The Histogram Test Method 236
8.7 AC Test Overview 242
Chapter Review Questions 252
CHAPTER 9. Test Circuit Design Considerations 254
9.1 Printed Circuit Board Physics 254
9.2 Resistor Physics 259
9.3 Capacitor Physics 260
9.4 Circuit Board Insulators and Guard Rings 261
9.5 Test Circuit Ground 262
9.6 Power Distribution 267
9.7 Transmission Lines 270
9.8 Transmission Line Matching 277
Chapter Review Questions 280
Glossary 282