PowerSI Noise Coupling Analysis Tutorial
Product Version Sigrity 2018
March 2019
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Contents
1
Introduction
Overview
Sample Case
2
Layout Setup
Loading Layout File
Checking Stackup
Selecting Power/Ground Nets
3
Simulation Setup
Enabling Base Mode
Disabling or Enabling Decaps
Setting Up Excitation
Defining Excitations on the Enable Nets
Defining Excitations Manually
Setting Up Simulation frequency
Setting Up Field Observation
Viewing Distribution by Menu Bar
Specifying Component Voltage
Assigning Capacitor Models
4
Simulation and Result
Running Simulation and Checking Report
Viewing, Checking and Processing Result
Viewing 3D Voltage Distribution
Viewing Spatial Curves
Appendix
Improved Spatial Curves
Improved 3D Results
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PowerSI Noise Coupling Analysis Tutorial
Table of Contents
1
Introduction
This tutorial describes how to use the Noise Coupling Analysis workflow in PowerSI to investigate
and solve the power/ground noise coupling issues.
Overview
This simulation flow allows you to study noise coupling within a design given one or more specific
sources.
Some typical usage scenarios are:
Finding specific noise induced on the power delivery from switching devices or noise induced
from the external power deliver
Finding conducted emissions and noise coupling paths
The noise sources can be piecewise linear current sources, chip current signatures (for eample
CPM models), spectral current signatures, and so on. Because of the non-linear behavior of IOs the
signal lines are typically not simulated in the PowerSI noise coupling analysis.
The Spatial Mode analysis is used for this analysis.
The Noise Coupling Analysis workflow in PowerSI leads you to:
Setup layout
Setup simulation
Run simulation
View results
Sample Case
The sample case used in this tutorial is
psi_brd_PDSdesign_NoDecp.spd
It is located in: <Sigrity_install_dir>\share\SpeedXP\Samples\PowerSI\Hybrid\
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PowerSI Noise Coupling Analysis Tutorial
Introduction
2
Layout Setup
This chapter describes how to set up layout for noise coupling simulation.
Loading Layout File
1. Launch PowerSI.
2. Select the Noise Coupling Analysis workflow.
3. Click Load Layout File to load psi_brd_PDSdesign_NoDecap.spd.
The workflow pane appears like the following figure shows. Some steps are enabled.
March 2019 5 Product Version Sigrity 2018
PowerSI Noise Coupling Analysis Tutorial
Layout Setup
