Interested reader of this post may also want to follow up with the of same topic and try out the free web app which realizes this conversion flow ibis to spice. 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. Presentation on ads solutions for signal integrity this presentation focuses on accurate transient simulation at gigabits data rate, system level simulation verification using ads and design tradeoff for a transparent via. Signal integrity tutorial this tutorial is intended for printed circuit board designers who wish to get an insight into the design of high speed digital pcbs. Signal integrity solution for highspeed designs electr longer. Chapter 1 introducing starhspice oregon state university.
Commands and control options provides reference information for hspice and hspice rf commands and options. Most of the buffer modeling flows focus on creating ibis models from existing transistor buffer design, usually in spice format. Highspeed board designers have come to rely upon the venerable ipcd317, design guide for electronic packaging utilizing highspeed. Signal integrity analysis using statistical methods july 2012 2011, hcl technologies, ltd.
Chapter 2 describes the different factors affecting the signal integrity of highspeed data links such as track lengthwidth, dielectric material properties of the pcb, type and length of track used microstripstrip line, data pattern dependency of the signal quality. Chapter 20 signal integrity college of engineering. For descriptions of the other manuals in the hspice documentation set, see the next section, the hspice documentation set. This should be used to achieve more accurate results. Sparameter modeling and simulation for signal integrity. 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. With extensive usage in analogrfmixedsignal ic design, cell and memory characterization, and chippackage boardbackplane signal integrity simulation.
Signal integrity simulations with hspice and ibis models. Snug san jose 2007 system level timing closure using hspice 7 4. Signal integrity simulation of pci express gen 2 channel. Review of signal integrity concepts at frequencies in the gigahertz range, a host of variables can affect signal integrity. Sparameter modeling and simulation for signal integrity analysis. Hspice reveals signal integrity problems caused by jitter, crosstalk, ringing, ground bounce, and other noise sources. This is achieved via the model assignments dialog or by manually setting the correct entry for the type field in the signal integrity model dialog, when editing the signal integrity model associated to the component placed on the schematic source document. It is difficult to simulate a million bits with a traditional hspice simulation, and this is where most existing signal integrity methodologies run into trouble. Hspice has the ability to simulate using vendor provided ibis models. For descriptions of the other manuals in the hspice documentation set, see the next section, the hspice. Introduction tointroduction to hspice asicreliability. It is the responsibility of the signal integrity engineer to take into account every component between the transmitter and receiver. A critical tool to knowing how a signal looks while propagating a trace, ibis models enable a view into what might happen as the signal confronts changes in impedance, vias, stubs, terminations, and other signal path geometries that can alter intended signal characteristics.
Foundrycertified models device models are the ingredients for accurate circuit simulation. Signal integrity analysis using statistical methods. Timing analysis basic timing, jitter, and signal integrity analysis. Elements and device models describes standard models you can use when simulating your circuit designs in hspice, including passive devices, diodes, jfet and mesfet devices, and bjt devices. Ibis model can enable signal integrity analysis before first. The presentation is intended for an audience that has little. It can also produce output files to be used by the awaves post processor. Keysight technologies 10 ways ads overcomes signal and power. Signal integrity engineer resume samples velvet jobs. This is an important feature, since signal integrity engineers tend to obtain models in many different formats. Part 2 design cycle 010 what is a signal integrity design cycle. Io management, board development support, and signal.
Signal integrity analysis can be a computeintensive task, and quantumsi leverages computer server farms to run hspices highaccuracy simulations in parallel, increasing analytical throughput. The hspice integration also includes a special interface layer to enforce passivity and causality on imported sparameter data sets. 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. Xilinx ug351 virtex5 fpga rocketio transceiver signal. Nonlinear io modeling with ibis and encrypted hspice buffers the small signal parameters can be used to characterize linear or nonlinear networks, which have sufficiently small signals. Essential principles of signal integrity is the introductory class that reveals the underlying truth of how interconnects affect signal integrity. Spartan6 fpga gtp transceiver signal integrity simulation kit 2. The traditional signal integrity process needs to be modified.
Signal integrity support of 4level pulse amplitude modulation pam4 for eye diagram simulation. Serial link hspice ami17 signal integrity analysis tools. Introduction high speed pcb design referes to the techniques that must be followed in order for a circuit to function properly when the edge rate of the signal is high. Signal integrity analysis investigates problems common to circuit. Resource description signal integrity analysis with thirdparty tools. Commands and control options provides reference information for hspice commands and options. Xilinx ug396 spartan6 fpga gtp transceiver signal integrity. Signal integrity simulatable data from suppliers without obtaining data that would allow them to reverse engineer the suppliers device and thus copy it. Synopsys hspice simulator and sisoft quantumsi combine to.
Identify signal integrity constraints driver to load delays including effects of crosstalk and ringback overshoot voltages other signal quality measures eye opening 2. Signal integrity basics by anritsu field application engineers table of contents 1. Chapter 20 signal integrity oregon state university. Cadence sigrity systemsi signal integrity solutions datasheet. Star hspice is ideal for cell design and process modeling and is the tool of choice for signal integrity and transmissionline analysis. Signal integrity describes how to use hspice to maintain signal integrity in a device design. Digital signals on transmission lines by gary breed editorial director s ignal integrity is one of the hot topics in digital circuit design. Signal integrity analysis of package and pcb for high speed.
Introduction high speed pcb design referes to the techniques that must be followed in order for a circuit to function properly when. In the next page we will learn about the parameters in hspice. Hspice simulation and analysis user guide describes how to use hspice to simulate and analyze your circuit designs. At its target speed, a significant part of the cycle time is spent in the actual propagation of the signals through the system. Describes how to use hspice to simulate and analyze circuit designs. 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. Generally the sparameter can be used for the statistical eye analysis as long as the channel exhibits lti behavior almost all interconnects are lti. Timing analysis basic timing, jitter, and signal integrity analysis parameter optimization balancing complex constraints, such as speed versus power, or frequency versus slew rate versus offset analog circuits source. For information about basic signal integrity concepts and signal integrity details pertaining to altera fpga devices. Hspice applications manual provides application examples and additional hspice user. The quartus ii software can export accurate hspice models with the builtin. A firstorder approximation assumes signals have no measurable rise or fall times essentially, squarewave behavior. Xilinx ug375 virtex6 fpga gtx transceiver signal integrity.
Hspice takes a spice file as input and produces output describing the requested simulation of the circuit. Hspice signal integrity guide describes how to use hspice to maintain signal integrity in your chip design. Timing analysis basic timing, jitter, and signal integrity. The ibis open forum meets every 3 weeks via teleconferencing and email and occasionally in person to ratify changes and set future directions. The associated signal integrity model type for each component has to be correct. Hspice provides fast and highaccuracy signal integrity simulation through advanced transistor, veriloga, ibis, welement and selement modeling support. Frank sill department of electrical engineering, federal university of minas gerais, a a to i c l 6627 cep 31270av.
Pci modeling using star hspice signal integrity 2034 star hspice manual, release 1998. Inside this manual this manual contains the chapters described below. To simulate a pc board or backplane with starhspice. Fortunately, serial links have operating characteristics that can be leveraged using new analysis techniques to effectively and practically simulate link behavior over millions of bits. Signal integrity analysis can be a computeintensive task, and quantumsi leverages computer server farms to run hspice s highaccuracy simulations in parallel, increasing analytical throughput. Modify the behavior of the interconnect to meet the constraints. Keysight technologies 10 ways ads overcomes signal and. The manual contains detailed reference information, application examples, and design flow descriptions to show how hspice rf features can be used for rf circuit characterization. This manual describes how to use hspice to maintain signal integrity in your. Altera corporation signal integrity analysis with thirdparty tools send feedback qii53020 62 signal integrity simulations with hspice and ibis models 2014. What follows is a listing of 8 ways in which asd can help you, the engineer, overcome your signal and power integrity challenges. Spice simulation is industrystandard for verification of circuit operation at transistor. 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. For beginners, chapters under tutorials provide a step by step guide to using hspice.
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