Spice simulation and signal integrity principles for high. Highspeed circuit board signal integrity, second edition. Identify signal integrity constraints driver to load delays including effects of crosstalk and ringback overshoot voltages other signal quality measures eye opening 2. Analogmixedsignal ams is tightly integrated with the xpedition design flow so the schematic used to drive simulation also moves your design seamlessly to layout. Highspeed board designers have come to rely upon the venerable ipcd317, design guide for electronic packaging utilizing highspeed.
Timing analysis and simulation for signal integrity. Equivalent circuit for spicebased transient simulation. Timing analysis and simulation for signal integrity engineers. A digital designers guide to verifying signal integrity primer. Whats the difference between signal integrity and power. Typical circuit simulators, such as different flavors of spice, employ nodal. Signal recovery ibis or spice model ibis or spice model. Artech house announced the publication of highspeed circuit board signal integrity, second edition by stephen c. Astar, institute of high performance computing ihpc national university of singapore. This page shows how to set up noise simulations using sstl buffer as example. High speed circuit board signal integrity download ebook. This seminar will provide a comprehensive educational experience in the principles of signal integrity engineering and spice simulation as they apply to the design of high performance digital systems electrical performance. System sipi analysis support with free spice simulators. Click download or read online button to get high speed circuit board signal integrity book now.
This is an important feature, since signal integrity engineers tend to obtain models in many different formats. Objective, realistic, and practical, this is the signal integrity resource engineers have been searching for. A digital designers guide to verifying signal integrity primer 2. Signal integrity analysis tongtong yu zhiyuan shen. To put it simply, high speed pcb design is any design where the integrity of your signals starts to be affected by the physical characteristics of your circuit board, like your layout, packaging, layer stackup, interconnections, etc if you start designing boards and run into problems like delays, attenuation, crosstalk, reflections, or. The equivalent spice circuits of utps cable are obtained by. The resistances i gave will be too strong for the avrisp to drive. However, you still want the resistor on the driver end of the wire, or youll want a buffer on the receive end so it would be miso out 27 ohm long wire buffer input, then buffer output 1k to 10k resistor isp header miso pin on avr.
Signal and power integrity simplified, 3rd edition informit. Generally the sparameter can be used for the statistical eye analysis as long as the channel exhibits lti behavior almost all interconnects are lti. Component, model and library concepts domains different phases of design schematic capture pcb layout 2d 3d spice simulation signal integrity analysis a unified component is a container with. For descriptions of the other manuals in the hspice documentation set, see the next section, the hspice. Does the signal reach its destination when it is supposed to. A fully developed spice model was used to simulate the packageplustest fixture. The simulated and measured reflectedtransmitted signals. Free spice simulator like ngspice, eispice, ltspice or even tispice are all berkeley spice derivatives. With extensive usage in analogrfmixedsignal ic design, cell and memory characterization, and chippackage boardbackplane signal integrity simulation, hspice is the industrys most popular, trusted and comprehensive circuit simulator. Huq is a signal integrity engineer and technical leader working for cisco system, incs elb signal integritypackaging design technology group. Topics that will be addressed include lumped discontinuities. This micro ebook details the importance of eliminating signal integrity challenges.
Simulation and modeling techniques for signal integrity and. Foundrycertified models device models are the ingredients for accurate circuit simulation. And also, when it gets there, is it in good condition. Chapter 20 signal integrity oregon state university. Computational electromagnetics electromagnetics for electromagnetic compatibility signal integrity analysis li erping, phd, ieee fellow advanced electromagnetics and electronic systems lab.
Noise and ground bounce failures are mainly cause by multiple simultaneously switching outputs sso. Cadence sigrity systemsi signal integrity solutions datasheet. Click image to enlarge d class1 sstl noise plot, best case, 2. The small signal parameters can be used to characterize linear or nonlinear networks, which have sufficiently small signals. Designing a robust and cost effective product is not about blindly following a general set of design rules, rather it is about following a process that helps you apply your engineering intuition to. Pdf improved spicelike macromodels are proposed to model unshielded twisted pairs utps. The presentation is intended for an audience that has little. I finally fixed and im now able to read data quite well. It enables pre and postroute topology exploration, signal analysis, and validation, allowing designers to increase circuit. Berkeley 3f5, eispice, ngspice, ltspice, available in public domain or free of charge. Computational electromagnetics electromagnetics for. This site is like a library, use search box in the widget to get ebook that you want. Discussions include transmission line theory as applied to digital time domain signals will be covered, including signal reflection and transmission, bus termination.
This article, part 3, shows how to use an ibis model to extract important variables for signalintegrity calculations and pcb. Effects such as crosstalk, coupling and delays in transmission lines have a big impact on. In signal integrity, we are trying to match the impedance of a trace to a certain value, often 50 to achieve good power integrity, we want the pdn to have the lowest impedance possible. To add a signal integrity model to a placed component in the schematic editor, open the components component properties dialog by doubleclicking on it. Macromodel synthesis for coupled discontinuities of signal path twoport z. Drawing on his work teaching several thousand engineers and graduate students, worldrenowned expert eric bogatin systematically presents the root causes of all. This flexible based simulation environment for pcb macromodeling extension language the sigwave waveform display can signal integrity analysis. Performing signal integrity analyses online documentation. Analogmixedsignal circuit simulation mentor graphics.
Sparameter modeling and simulation for signal integrity. Advanced design simulation extend standard time and frequency domain analyses to explore design sensitivities, sweep circuit parameters, determine manufacturing yields including. How to efficiently analyze a ddr4 interface cadence. The most common cause of the non linearity in the system is a non linear. Pdf spice model extraction for signal integrity analysis. Signal integrity simulation of pci express gen 2 channel. Relationship between signal integrity and emc ieee. Tdr concept and layer peeling technique one port z. For descriptions of the other manuals in the hspice documentation set, see the next section, the hspice documentation set.
Review of signal integrity concepts at frequencies in the gigahertz range, a host of variables can affect signal integrity. Tu01 performing signal integrity analyses version v1. It covers setting up design parameters like design rules and signal integrity models, starting up signal integrity from the schematic and pcb editors, configuring the tests to be used in the net screening analysis, running further analysis on selected nets, terminating the signal line, setting preferences and working with the. Since then, he has participated in the development and testing of nine other highperformance computing platforms for cray research, inc. Spice 1972 fortran spice 2 1975, spice 2g6 1983 spice 3 1989 c, spice 3f5 1993 spice 4 2004 rf proprietary versions of spice spicelike simulators or alphabet spice hspice, xspice georgia tech, pspice, etc. Signal integrity simulation and equivalent circuit modeling.
Spice model definitions signal integrity description 3d graphical description. Circuit topology created with spice or veriloga formatted pins. Sigrity systemsi signal integrity solutions cadence esign systems enables global electronic design innovation and plays an essential role in the creation of todays electronics customers use cadence software, hardware, ip, and expertise to design and verify todays mobile, cloud, and connectivity applications. Signal integrity analysis and simulation tools include ibis models by john olah and sanjeev gupta, agilent eesof eda, and carlos chavezdagostino, altera corporation s ignal integrity is a major concern for engineers working on high data rate designs. Pdf spice model extraction for signal integrity analysis of. The presentation is intended for an audience that has little or no formal training in electromagnetic theory and microwave engineering. Essential principles of signal integrity is the introductory class that reveals the underlying truth of how interconnects affect signal integrity. Spice model extraction for signal integrity analysis of unshielded twisted pairs from full wave simulation. Effective signal integrity analysis using ibis models.
Highspeed board designers have come to rely upon the venerable ipcd317, design guide for electronic packaging utilizing highspeed techniques in the design of their highspeed circuitry. Solfins, cadcam, cad, 3d cad, cam, solidworks, altium designer, pcb, fpga, protel, embeded software, embeded systems. Page 2 sigwave orcad signal explorer provides a spice for more complex devices. As demonstrated in this paper, transmission line behavior can be accurately modeled using simple spice simulations in an lc network. Greg edlunds career in signal integrity began in 1988 at supercomputer systems, inc. Digital signals on transmission lines by gary breed editorial director s ignal integrity is one of the hot topics in digital circuit design. Enhanced signal integrity simulation capability ads 2006 update 1. Signal and power integrity simplified, 3rd edition. It demonstrates how to apply em theory with a practical applicationoriented approach. Signal integrity analysis of highspeed interconnects.
Spice model extraction for signal integrity analysis of. Integrated macromodeleditor allows easy and fast definition of own models using databook or measurement values. Transmissionline theory quantifies signal propagation. Signal integrity models can also be included in the new integrated component libraries. May 11, 20 solfins, cadcam, cad, 3d cad, cam, solidworks, altium designer, pcb, fpga, protel, embeded software, embeded systems. A better understanding of transmission line behavior is important for achieving proper impedance matching and proper termination to minimize loss from reflections and also to maximize signal integrity.
Signal integrity models are linked into the integrated components. Signal integrity analysis and simulation tools include. Due to historical reasons, their focus tends to be more onchip or vendor products specific, like bsim34 for berkeley spice and voltage regulator for ltspice. The following plot shows a class 1 sstl buffer driving the loading shown in above schematic with 3. In our tool, we do have builtin ibis parser implemented in crossplatform format to support this ibis to spice conversion flow. You can access the pdf format documentation from your install directory for.
Signal integrity issues remain a concern for many in the electronics industry. Arria v early ssn estimator and user guide pdf purchase the transceiver signal integrity development kit, stratix iv gx edition to evaluate transceiver signal integrity and interoperability visit the board design resource center to view all the tools and models for your intel fpga designs. Relationship between signal integrity and emc presented by hasnain syed solectron usa, inc. Transmission line effect interconnection effect different from traditional circuit analysis. Inside this manual this manual contains the chapters described below. Signal integrity basics by anritsu field application engineers table of contents 1. Modify the behavior of the interconnect to meet the constraints. A digital designers guide to verifying signal integrity. Interactive tutorial on fundamentals of signal integrity for high. Ringing and overshoot large overshoot damage device crossing logic threshold. Goodmost thirdparty tools that support spice support hspice. Signal quality is maintained from a driver to a receiver interference between two or more signals doesnt degrade the signal the signals dont damage any devices power distribution network pdn integrity is maintained timing margins are achieved 06052007 hasnain syed 2. This manual describes how to use hspice to maintain signal integrity in your. Faster transient simulation advanced convolution ibis io models broadband spice model generator improved design flow integration superior via modeling capability.
Appendices present a refresher on spice modeling and a highlevel conceptual framework for electromagnetic field behavior. Simulations for signalintegrity effects at board level provide a way to study and. Written by signal integrity engineer fadi deek of mentor, a siemens business, the chapters explore four possible signal integrity problems using an understanding of essential signal. This thoroughly updated leadingedge circuit design resource presents the underpinnings and practical guidance needed to analyze, investigate, and solve signal and power integrity issues. The goal of signal integrity analysis is to ensure reliable highspeed data transmission. Pcad signal integrity users guide 3 supporting the ibis 3 industry standard subset for io buffer modeling. For example, connector vendors may supply their customers with sparameter files, spiceequivalent circuit models, or even cad models that need to be simulated in a 3d electromagnetic em solver. Pcad signal integrity utilizes the pcad pcb, dbx api interface for interactive communications. Each component will be assigned a status as described in the following table. Spi signal integrity electrical engineering stack exchange.
1327 351 733 167 300 1537 4 1535 1547 460 925 12 1411 100 351 642 1420 294 1214 928 1098 1232 1192 570 934 1332 5 241 840 1015 922 1256 524 867 531 513 583 365 89 518 987 222 1123 656 1241