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New System-Level Techniques for Optimizing Signal/Power Integrity in High-Speed Interfaces--from Pioneering Innovators at Rambus, Stanford, Berkeley, and MIT
As data communication rates accelerate well into the multi-gigahertz range, ensuring signal integrity both on- and off-chip has become crucial. Signal integrity can no longer be addressed solely through improvements in package or board-level design: Diverse engineering teams must work together closely from the earliest design stages to identify the best system-level solutions. In High-Speed Signaling, several of the field’s most respected practitioners and researchers introduce cutting-edge modeling, simulation, and optimization techniques for meeting this challenge.
Edited by pioneering experts Drs. Dan Oh and Chuck Yuan, these contributors explain why noise and jitter are no longer separable, demonstrate how to model their increasingly complex interactions, and thoroughly introduce a new simulation methodology for predicting link-level performance with unprecedented accuracy.
The authors address signal integrity from architecture through high-volume production, thoroughly discussing design, implementation, and verification. Coverage includes
High-Speed Signaling thoroughly introduces new techniques pioneered at Rambus and other leading high-tech companies and universities: approaches that have never before been presented with this much practical detail. It will be invaluable to everyone concerned with signal integrity, including signal and power integrity engineers, high-speed I/O circuit designers, and system-level board design engineers.
Introduction to High-Speed Signaling
Download the sample pages (includes Chapter 1 and Index)
Preface viii
Chapter 1 Introduction 1
1.1 Signal Integrity Analysis Trends 4
1.2 Challenges of High-Speed Signal Integrity Design 8
1.3 Organization of This Book 9
References 11
Chapter 2 High-Speed Signaling Basics 13
2.1 I/O Signaling Basics and Components 13
2.2 Noise Sources 24
2.3 Jitter Basics and Decompositions 33
2.4 Summary 39
References 39
Part I Channel Modeling and Design 41
Chapter 3 Channel Modeling and Design Methodology 43
3.1 Channel Design Methodology 44
3.2 Channel Modeling Methodology 49
3.3 Modeling with Electromagnetic Field Solvers 52
3.4 Backplane Channel Modeling Example 54
3.5 Summary 63
References 64
Chapter 4 Network Parameters 65
4.1 Generalized Network Parameters for Multi-Conductor Systems 66
4.2 Preparing an Accurate S-Parameter Time-Domain Model 77
4.3 Passivity Conditions 85
4.4 Causality Conditions 89
4.5 Summary 98
References 101
Chapter 5 Transmission Lines 103
5.1 Transmission Line Theory 104
5.2 Forward and Backward Crosstalk 109
5.3 Time-Domain Simulation of Transmission Lines 115
5.4 Modeling Transmission Line from Measurements 121
5.5 On-Chip Wire Modeling 136
5.6 Comparison of On-Chip, Package, and PCB Traces 142
5.7 Summary 145
References 145
Part II Analyzing Link Performance 151
Chapter 6 Channel Voltage and Timing Budget 153
6.1 Timing Budget Equation and Components 155
6.2 Fibre Channel Dual-Dirac Model 156
6.3 Component-Level Timing Budget 160
6.4 Pitfalls of Timing Budget Equation 161
6.5 Voltage Budget Equations and Components 164
6.6 Summary 165
References 165
Chapter 7 Manufacturing Variation Modeling 167
7.1 Introduction to the Taguchi Method 168
7.2 DDR DRAM Command/Address Channel Example 179
7.3 Backplane Link Modeling Example 186
7.4 Summary 192
7.5 Appendix 193
References 196
Chapter 8 Link BER Modeling and Simulation 197
8.1 Historical Background and Chapter Organization 198
8.2 Statistical Link BER Modeling Framework 199
8.3 Intersymbol Interference Modeling 206
8.4 Transmitter and Receiver Jitter Modeling 210
8.5 Periodic Jitter Modeling 218
8.6 Summary 225
References 226
Chapter 9 Fast Time-Domain Channel Simulation Techniques 229
9.1 Fast Time-Domain Simulation Flow Overview 230
9.2 Fast System Simulation Techniques 232
9.3 Simultaneous Switching Noise Example 245
9.4 Comparison of Jitter Modeling Methods 246
9.5 Peak Distortion Analysis 248
9.6 Summary 253
References 253
Chapter 10 Clock Models in Link BER Analysis 257
10.1 Independent and Common Clock Jitter Models 258
10.2 Modeling Common Clocking Schemes 259
10.3 CDR Circuitry Modeling 268
10.4 Passive Channel JIF and Jitter Amplification 273
10.5 Summary 277
References 277
Part III Supply Noise and Jitter 279
Chapter 11 Overview of Power Integrity Engineering 281
11.1 PDN Design Goals and Supply Budget 282
11.2 Power Supply Budget Components 283
11.3 Deriving a Power Supply Budget 287
11.4 Supply Noise Analysis Methodology 290
11.5 Steps in Power Supply Noise Analysis 294
11.6 Summary 300
References 301
Chapter 12 SSN Modeling and Simulation 303
12.1 SSN Modeling Challenges 305
12.2 SI and PI Co-Simulation Methodology 310
12.3 Signal Current Loop and Supply Noise 321
12.4 Additional SSN Modeling Topics 325
12.5 Case Study: DDR2 SSN Analysis for Consumer Applications 330
12.6 Summary 336
References 337
Chapter 13 SSN Reduction Codes and Signaling 339
13.1 Data Bus Inversion Code 340
13.2 Pseudo Differential Signaling Based on 4b6b Code 346
13.3 Summary 357
References 357
Chapter 14 Supply Noise and Jitter Characterization 359
14.1 Importance of Supply Noise Induced Jitter 360
14.2 Overview of PSIJ Modeling Methodology 361
14.3 Noise and Jitter Simulation Methodology 364
14.4 Case Study 372
14.5 Summary 376
References 377
Chapter 15 Substrate Noise Induced Jitter 379
15.1 Introduction 380
15.2 Modeling Techniques 382
15.3 Measurement Techniques 391
15.4 Case Study 393
15.5 Summary 400
References 400
Part IV Advanced Topics 403
Chapter 16 On-Chip Link Measurement Techniques 405
16.1 Shmoo and BER Eye Diagram Measurements 407
16.2 Capturing Signal Waveforms 408
16.3 Link Performance Measurement and Correlation 411
16.4 On-Chip Supply Noise Measurement Techniques 412
16.5 Advanced Power Integrity Measurements 418
16.6 Summary 422
References 423
Chapter 17 Signal Conditioning 425
17.1 Single-Bit Response 426
17.2 Equalization Techniques 427
17.3 Equalization Adaptation Algorithms 433
17.4 CDR and Equalization Adaptation Interaction 442
17.5 ADC-Based Receive Equalization 445
17.6 Future of High-Speed Wireline Equalization 448
17.7 Summary 449
References 450
Chapter 18 Applications 455
18.1 XDR: High-Performance Differential Memory System 456
18.2 Mobile XDR: Low Power Differential Memory System 465
18.3 Main Memory Systems beyond DDR3 476
18.4 Future Signaling Systems 486
References 491
Index 495