Product Documentation

Virtuoso Parasitic Aware Design User Guide
Product Version IC23.1, November 2023

Contents

1

Parasitic Aware Design in Virtuoso ADE Explorer, Virtuoso ADE Assembler, and Virtuoso Schematics L/XL

From the IC6.1.1 release, the availability of parasitic aware design functionality differs depending upon the software you access it from.

Licensing Requirements

Introducing Parasitic Aware Design in ADE Explorer, ADE Assembler and Schematics L/XL

Analog Design Flow Supported by Parasitic Aware Design

Views Supported by Parasitic Aware Design

Accessing Parasitic Aware Design Functionality in Virtuoso Layout Suite XL/GXL

Smart-Parasitics Menu

Smart-Parasitics – Display Parasitics

Smart-Parasitics – Clear Parasitics

Smart-Parasitics – Overlay Layout

Accessing Smart View in ADE

Accessing Parasitic Aware Design Functionality in ADE Explorer, ADE Assembler and Schematics L/XL

Parasitics Menu

Parasitics – Set Up

Parasitics – Options

Parasitics – Parametric Variables

Parasitics – Show/Hide Parasitics

Parasitics – Report Parasitics

Parasitics – Refine Extracted View

Parasitics – Probe Design Inst/Net

Probing Out-Of-Context and In-Context

Out-Of-Context Probing

In-Context Probing

An Analog Simulation Flow using PVS

Preparing Cell Libraries

Creating an Analog Extracted View

Backannotating Parasitic Values

Performing Backannotation

Reporting and Probing Parasitic Values

Creating a Configuration

Simulating the Design in ADE Explorer

Out-of-context Probing in ADE Explorer

2

Parasitic Aware Design in ADE Explorer and ADE Assembler

Chapter Contents

Accessing Parasitic Aware Design Functionality

Customizing Parasitic Assistant Display

Parasitic Aware Design Workspace Configurations

Setting Up and Using Parasitics

An Introduction to Parasitic Estimates

Parasitics/LDE – Setup

Parasitics/LDE – Create Estimates

Parasitics/LDE – Create Filters

Parasitics/LDE – Report

Parasitics/LDE – Compare

Parasitics/LDE – Options

Extracted Parasitics

Related Information

An Introduction to Extracted Parasitics

An Introduction to Parasitic Filters

Extracted Parasitics Flow Overview

Optimizing an Extracted or Layout View

Parasitics & Electrical Setup Assistant

Accessing the Parasitics & Electrical Setup Assistant

The Parasitics & Electrical Estimates Assistant Toolbar

The Parasitics & Electrical Setup Assistant Estimate Editor

The Parasitics & Electrical Setup Assistant Context-Menu

Creating Parasitic Estimates

Entering Parasitic Sweeps

Saving Parasitic Estimates Created in the Current Session

Building the Parasitic/LDE View

Parasitic Stitching

Important Points to Consider for Parasitic Stitching of Resistance

Parasitic Filters Assistant

Accessing the Parasitic Filters Assistant

The Parasitic Filters Assistant Toolbar

The Parasitic Filters Assistant Context-Menu

Saving Parasitic Filters Created in the Current Session

Creating Parasitic Filters

Editing Parasitic Filters Parameter Values

Deleting Parasitic Filters

Refining the Extracted View

Parasitic Report Assistant

Parasitic Report Assistant Available Reports

Understanding Parasitic Report Results

Exporting Parasitic Reports

Setting Up Effective R Reports

Opening an Extracted View from the Parasitic Report Assistant and Cross-Probing Parasitics

Showing and Hiding Parasitics from the Parasitic Report Assistant

Comparison Reports

Parasitic Comparisons

Accessing the Compare Parasitics Form

Running DC Oppoint Simulation for Comparisons

Comparing Estimated Parasitics With Extracted Parasitics - Summary

Comparing Against a Refined Extracted View

The Parasitic Mode Toolbar

Applying Sweeps from the Parasitic Mode Toolbar

Parasitic Probing and Ultrasim

A

Parasitic Aware Design Environment Variables

elaborateUsingConfig

userDefinedCDFUpdater

msps.backAnnotate

effectiveRWarnLimit

msps.buildAnalog

analogExtractedViewName

disableAutoCreate

disableAutoUpdate

parasiticProbeFile

mspsAv.backAnnotate

mspsAv.buildAnalog

analogExtractedViewName

mspsAv.instProbe

maxConsecutiveMessages

displayExtNetNames

mspsAv.parProbe

parasiticProbeFile

stitchParasitics

mspsAv.simProbe

saveOnlyExternalNodes

saveOnlyOneGroupInstNode

createMaxCapDuringTransfer

expandSchematicDevices

gndCoupledCapToUnboundNets

ignoreBackAnnotatedDummyDevices

includeLayoutParasitics

includeLdeParameters

includeSchematicEstimates

individualInstCdfCallbacks

ldeIgnoreModels

ldeParameterCacheEnabled

ldeParameterSource

ldeParameterTool

stitchFloatingNets

ldeSwitchSourceDrainTerms

mixSchEstWithLayoutParasitics

singleFactorExpansion

showAllCellViews

netlistViewType

useNewSetupForm

ignoreLVSInstForStitching

lxRemoveDeviceForStitching

reduceParallelCaps

svDisplayResistance

svDisplayInductance

svDisplayCapacitance

svDisplayNodeName

svResistanceThresholdMin

svResistanceThresholdMax

svCapacitanceThresholdMin

svCapacitanceThresholdMax

svInductanceThresholdMin

svInductanceThresholdMax

svInductorStyle

B

Backannotation of dcOp / Transient Values for M-Factor Devices

Identifying M-Factor Devices

Grouping M-Factor Devices At Extraction Time

Using opParamExprList Functionality

Specifying Parameters to be Displayed

C

Parasitic Aware Design and Diva Verification

Diva Flow: Simulating Analog Circuits with Parasitic Aware Design

Preparing Cell Libraries

Creating Designs

Creating Extracted Views

Creating and Using a Configuration

Simulating the Design

Probing Parasitic Values

Backannotating Parasitic Values

Diva Flow: Simulating Mixed-Signal Circuits with Parasitic Aware Design

Estimating Delays (Pre-Layout)

Calculating Delays (Post-Layout)

Preparing for Post-Layout Mixed-Signal Parasitic Aware Design

Probing Parasitic Values

D

Parasitic Aware Design Workspace Configurations

Availability of Parasitic Aware Design Features

Setting Parasitic Aware Design Options Using .cdsenv

Error Message Display

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