Standard and Expert Tools in the industrial EDA/EMC design flow

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1 1www..de Standard and Expert Tools in the industrial EDA/EMC design flow Dirk Müller

2 2www..de offers a CAD Flow offers a CAD Flow from different vendors in Central Europe

3 3www..de The Challenges by User Role Manager SI Expert Engineer Time to Market, Cost of production Cost and time efficient Design Flow Reuse of know how from Libraries Solve new challenges Offer guidelines and solutions Qualification: often PhD Design of products on time Enter Design Intent and Design Constraints Qualification: often Electrical Engineer PCB Layout Implementation of Design for Manufacturing Follow Design Intent and Design Constraints Qualification: often Technician

4 4www..de The Tools MS-Excel & MS-PowerPoint Manager SI Expert Engineer Generic research tools Many degrees of freedom with many parameters Generate validated solutions Constraint Manager Automated design rule checks SI / PI Verification with validated models PCB Layout Constraint Manager Interactive and auto router DFM

5 5www..de SI-Tool Features CST PCB Studio Solution for SI Solution for PI TL Model 3D Field Solver S-Parameter Eye Diagramms Correlated accuracy EDA Vendor PCB SI / PI Solution for SI Solution for PI TL Model 3D Field Solver S-Parameter Eye Diagramms Correlated accuracy So what is the difference?

6 6www..de Use Models CST Stand alone with many interfaces PCB data import MWS export Variation of Solvers Understanding problem s reason Explore alternatives to implementation EDA Vendors Integrated solution Attached to Constraint Manager Guided use models for typical applications PCI Express, DDR2/3 Batch mode Constraint generation Integration of timing

7 7www..de Today s Issues of Experts: Accuracy of Power Integrity Analysis and Layer Reduction CST PCBS layout export for 3D analysis with CST MWS Influence of Via Length on Signal integrity Determination of the receiving characteristics of near-field probes by simulation of the fields in transmitting mode Influence of Metal Planes on the Parasitic Behaviour of EMC Filter Structures PCB Layout: Meet Design Constraints

8 8www..de Signal Screening for SI Locate Voltage Peak Calculate Signal Energy Calculate Noise Energy Define Bit Center Expand to Bit Width SNR Value = Signal Energy Noise Energy Confidential

9 9www..de Semiautomatic Design Audit Error status Individuel Resolving / Ignore Manual Resolve

10 10www..de Model Editor Easy to Use RMB or Edit Menu or Toolbar Icon IBIS model assignment Viewer displays Curves Data

11 11www..de Source Synchronous Bus Simulation Multi Strobe Support (Address topology) Timing Margin Updated Bus Simulation Report Added flexibility for derating tables

12 12www..de Allegro PCB Power Delivery Network Analysis Accuracy 3D full wave-solver (MoM) Co-development University of Illinois at Urbana-Champaign (UIUC) Speed optimization On-the-fly Analysis Change and revalidate Via field generates IR drop Integration Launch from PCB Editor Engineering tool Optimal solution without vias

13 13www..de PDN Analysis Abilities Static IR Drop Analysis Voltage drop distribution Current distribution Current density distribution Temperature distribution PI Plane Analysis Design guide Pre-route analysis PI Network Analysis Post-route verification

14 14www..de DC Net Selection

15 15www..de DeCap Management Supported capacitor models Espice S Parameter X2Y capacitor supported Array capacitor

16 16www..de Advanced Settings Return Path System will auto find a return path for each power pin by default You can manually change as well Padstack/Drill Use verified S-models

17 17www..de Correlation with 3 rd Party Tools

18 18www..de IR Drop Current Path Display Showing current flowing direction with arrows Canvas selection reveals current value in Options pane

19 19www..de IR Drop Current Density Display Easy to find hot spots Current direction shown as well

20 20www..de Standard & Expert Tools Standard Tools: Offer an integrated solution for verification in the constraint driven design flow Are optimized for known structures (PCB) with limited parameters Run in background in batch mode Expert Tools: Help to discover unknown solutions Have many parameters to change Interface for advanced solutions like MWS Solver Choice SI Expert Engineer PCB Layout CST EDA Vendor Both help solving engineering issues together

21 21www..de When to use CST? Evaluate and specify out of the flow Try capacitors which are not in the library Use individual meshing When discovered critical situations Non standard data interfaces Untypical via structures (generate S-Parameters) Solve hotspots located by standard tools When a full 3D full wave simulation is required Export to CST MWS EM field calculations Complex problems with SI, PI and EMC

22 22www..de