Clayton R. Paul

Transmission Lines in Digital Systems for EMC Practitioners

• Gebundenes Buch

Produktbeschreibung

This is a brief but comprehensive book covering the set of EMC skills that EMC practitioners today require in order to be successful in high-speed, digital electronics. The basic skills in the book are new and weren't studied in most curricula some ten years ago. The rapidly changing digital technology has created this demand for a discussion of new analysis skills particularly for the analysis of transmission lines where the conductors that interconnect the electronic modules have become "electrically large," longer than a tenth of a wavelength, which are increasingly becoming important. Crosstalk between the lines is also rapidly becoming a significant problem in getting modern electronic systems to work satisfactorily. Hence this text concentrates on the modeling of "electrically large" connection conductors where previously-used Kirchhoff's voltage and current laws and lumped-circuit modeling have become obsolete because of the increasing speeds of modern digital systems. This has caused an increased emphasis on Signal Integrity.

Until as recently as some ten years ago, digital system clock speeds and data rates were in the hundreds of megahertz (MHz) range. Prior to that time, the "lands" on printed circuit boards (PCBs) that interconnect the electronic modules had little or no impact on the proper functioning of those electronic circuits. Today, the clock and data speeds have moved into the low gigahertz (GHz) range.

Produktdetails

• Verlag: Wiley & Sons
• 1. Auflage
• Seitenzahl: 288
• Erscheinungstermin: 22. November 2011
• Englisch
• Abmessung: 240mm x 161mm x 20mm
• Gewicht: 598g
• ISBN-13: 9781118143995
• ISBN-10: 111814399X
• Artikelnr.: 33874470

Autorenporträt

CLAYTON R. PAUL, PhD, is Professor and Sam Nunn Eminent Chair in Aerospace Engineering in the Department of Electrical and Computer Engineering at Mercer University. The author of twelve electrical engineering textbooks, he has also published more than 200 technical papers primarily on the electromagnetic compatibility of electronic systems. Dr. Paul is a Fellow of the IEEE and a member of Tau Beta Pi and Eta Kappa Nu.

Inhaltsangabe

Preface xi 1 Transmission Lines: Physical Dimensions vs. Electric Dimensions 1 1.1 Waves
Time Delay
Phase Shift
Wavelength
and Electrical Dimensions
4 1.2 Spectral (Frequency) Content of Digital Waveforms and Their Bandwidths
10 1.3 The Basic Transmission-Line Problem
22 2 Time-Domain Analysis of Two-Conductor Lines 31 2.1 The Transverse Electromagnetic Mode of Propagation and the Transmission-Line Equations
32 2.2 The Per-Unit-Length Parameters
37 2.2.1 Wire-Type Lines
37 2.2.2 Lines of Rectangular Cross Section
47 2.3 The General Solutions for the Line Voltage and Current
50 2.4 Wave Tracing and Reflection Coefficients
54 2.5 A Simple Alternative to Wave Tracing in the Solution of Transmission Lines
60 2.6 The SPICE (PSPICE) Exact Transmission-Line Model
70 2.7 Lumped-Circuit Approximate Models of the Line
75 2.8 Effects of Reactive Terminations on Terminal Waveforms
84 2.8.1 Effect of Capacitive Terminations
85 2.8.2 Effect of Inductive Terminations
87 2.9 Matching Schemes for Signal Integrity
89 2.10 Effect of Line Discontinuities
96 2.11 Driving Multiple Lines
101 3 Frequency-Domain Analysis of Two-Conductor Lines 103 3.1 The Transmission-Line Equations for Sinusoidal Steady-State (Phasor) Excitation of the Line
104 3.2 The General Solution for the Line Voltages and Currents
105 3.3 The Voltage Reflection Coefficient and Input Impedance of the Line
106 3.4 The Solution for the Terminal Voltages and Currents
108 3.5 The SPICE Solution
111 3.6 Voltage and Current as a Function of Position on the Line
112 3.7 Matching and VSWR
115 3.8 Power Flow on the Line
117 3.9 Alternative Forms of the Results
120 3.10 Construction of Microwave Circuit Components Using Transmission Lines
120 4 Crosstalk in Three-Conductor Lines 125 4.1 The Multiconductor Transmission-Line Equations
125 4.2 The MTL Per-Unit-Length Parameters of Inductance and Capacitance
131 4.2.1 Wide-Separation Approximations for Wires
135 4.2.2 Numerical Methods
145 5 The Approximate Inductive-Capacitive Crosstalk Model 155 5.1 The Inductive-Capacitive Coupling Approximate Model
159 5.2 Separation of the Crosstalk into Inductive and Capacitive Coupling Components
166 5.3 Common-Impedance Coupling
172 5.4 Effect of Shielded Wires in Reducing Crosstalk
173 5.4.1 Experimental Results
182 5.5 Effect of Shield Pigtails
183 5.5.1 Experimental Results
187 5.6 Effect of Multiple Shields
188 5.6.1 Experimental Results
188 5.7 Effect of Twisted Pairs of Wires in Reducing Crosstalk
197 5.7.1 Experimental Results
203 5.8 The Shielded Twisted-Pair Wire: The Best of Both Worlds
209 6 The Exact Crosstalk Prediction Model 211 6.1 Decoupling the Transmission-Line Equations with Mode Transformations
212 6.2 The SPICE Subcircuit Model
215 6.3 Lumped-Circuit Approximate Models of the Line
231 6.4 A Practical Crosstalk Problem
237 Appendix A Brief Tutorial on Using PSPICE 245 Index 267