Frequency-Domain PI + Time-Domain EMI / EMC / ESD
Sigrity PowerSI & SpeedEM
Two complementary Sigrity engines — PowerSI for AC frequency-domain power integrity signoff, and SpeedEM (formerly SPEED2000) for fast time-domain EMI / EMC / ESD scanning across boards and systems.
Overview
Two Engines, One Sigrity X Flow
PowerSI performs frequency-domain AC analysis of your PDN — impedance signoff, decap effectiveness, plane resonance, and noise coupling — so you can prove your power delivery network meets target impedance across the full operating spectrum.
SpeedEM scans designs for EMI / EMC and ESD issues in the time domain — fast multi-board / multi-package full-wave simulation that highlights radiation, susceptibility, and ESD-current hot spots before they show up in EMC chamber tests.
PowerSI
AC Frequency-Domain Power Integrity
Sign off the PDN against target impedance, find resonances, and optimise decoupling.
PDN Impedance Signoff
Frequency-domain Z(f) analysis at every relevant node — verify the PDN meets target impedance across the full band.
Plane Resonance
Identify power / ground plane resonance modes that amplify noise and lead to coupling issues.
Decap Effectiveness
Visualise where existing decaps are working — and where they are not — across the design frequency range.
Noise Coupling
Quantify power-to-signal and inter-rail coupling so you can fix it before silicon meets prototype.
S-Parameter Output
Export broadband S-parameter models of the PDN for use in system-level simulation or compliance flows.
10X Faster Engine
Built on the re-architected Sigrity X engine — same accuracy, much faster turnaround on full-board PDN runs.
SpeedEM
Time-Domain EMI / EMC / ESD Scanning
Scan boards, packages, and full systems for EMI / EMC and ESD issues — before the EMC chamber tells you the bad news.
EMI Scanning
Identify radiation hot spots from PCB layout and PDN — high-current loops, edge radiation, common-mode coupling.
EMC Pre-Compliance
Catch EMC compliance issues early so your first trip to the chamber is a pass, not a learning experience.
ESD Analysis
Time-domain ESD-current path analysis — find where ESD energy will flow and whether protection is effective.
Multi-Board Capable
Simulate multi-board and multi-package systems together — including connectors, cables, and chassis interactions.
Full-Wave Time Domain
Fast transient EM solver — combines electromagnetic accuracy with the speed needed for full-system scans.
What-If Iteration
Quickly test layout / stackup / shield changes and re-scan — turn a multi-day EMC fix into a same-day iteration.
Which Engine, When
PowerSI vs SpeedEM — Pick the Right Tool
Use PowerSI when…
- You need PDN impedance signoff against a target Z(f) curve
- You're optimising decap placement or count for a fixed BOM
- You suspect a plane resonance is causing noise on an IO rail
- You need broadband PDN S-parameter models for downstream SI
- You want frequency-domain visibility into power-ground coupling
Use SpeedEM when…
- You're scanning for EMI / EMC risk before chamber testing
- You need to evaluate ESD current paths and protection effectiveness
- You're simulating multi-board or full-system EM behaviour
- You need fast time-domain answers, not narrow-band spot checks
- You're iterating on shielding, stackup, or layout to reduce radiation
Related
Works Well With
OptimizePI
Automated, cost-driven decap optimization — consumes PowerSI PDN models to find the cheapest compliant solution.
Learn More
PCB Extraction Option
Hyper-accurate S-parameter PCB models — feed them into PowerSI / SpeedEM for higher-fidelity signoff.
Learn More
Aurora for PCB
Embedded Sigrity engines in the Allegro X PCB canvas — start the SI / PI conversation early in design.
Learn More
Get Started
Sign Off Your PDN. Pass EMC the First Time.
Talk to Craftronics about Sigrity PowerSI and SpeedEM for your power-integrity and EMI / EMC / ESD analysis flow.