文档介绍：Simulation and Design
Management for High-Speed
Interconnect
Tony Donisi - Ansoft Corporation
Rich Mellitz - Intel
SI Design Challenges
Traditional design solutions
Disparate, Disconnected solvers
Highly error prone
Intel - addresses industry design challenges
Design management and technology
Gigabit speeds lead to multi-GHz frequencies
3D Models must be characterized by S-parameters
Accurate transmission line models required
New circuit solver technology required for accurate results
Frequency and time domain required
Eye, TDR, Insertion/Return Loss
High switching speeds lead to great demands on power integrity
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Design Flow Solution
Integration and EM/Circuit co-design
Ansoft Designer/Nexxim
3D Modeling
Connectors, vias, packaging, escape routing
HFSS
Planar EM modeling
Trace discontinuities, "long" transmission lines
How long is "long?"
Planar EM
Transmission line modeling
Nexxim
Full channel time and frequency domain analysis
Nexxim
Design Flow Solution
Fit into existing design flow OptimizationOptimization VsVs WorstWorst
CaseCase analysisanalysis
.alter
Netlist syntax
Legacy tools
Set goals for improved flow
User friendly schematic entry
Integration of EM simulation
Multi-variable tuning of parameters, circuits & libraries
Minimal simulations
Implement improved flow
No pain
Properly ponents
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Ansoft Designer With Nexxim
Frequency and time domain in one engine
Integrates seamlessly with HFSS, Planar EM
Combines circuit, system, planar and HFSS
Handles all S-parameter and W-element models
Superior algorithms
"Corrects" s-parameters
Very large capacity
Orders of magnitude greater petitive software
Robust convergence
Solves causality and passivity issues
Flexibility
User created scripts
Simulation & Modeling Process
Courtesy of Intel®
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