Student Workbook Mentor Graphics Corporation All rights reserved.

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1 Eldo Platform Unique Advanced Noise Student Workbook 2018 Mentor Graphics Corporation All rights reserved. This document contains information that is trade secret and proprietary to Mentor Graphics Corporation or its licensors and is subject to license terms. No part of this document may be photocopied, reproduced, translated, distributed, disclosed or provided to third parties without the prior written consent of Mentor Graphics.

2 This document is for information and instruction purposes. Mentor Graphics reserves the right to make changes in specifications and other information contained in this publication without prior notice, and the reader should, in all cases, consult Mentor Graphics to determine whether any changes have been made. The terms and conditions governing the sale and licensing of Mentor Graphics products are set forth in written agreements between Mentor Graphics and its customers. No representation or other affirmation of fact contained in this publication shall be deemed to be a warranty or give rise to any liability of Mentor Graphics whatsoever. MENTOR GRAPHICS MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. MENTOR GRAPHICS SHALL NOT BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS PUBLICATION OR THE INFORMATION CONTAINED IN IT, EVEN IF MENTOR GRAPHICS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. U.S. GOVERNMENT LICENSE RIGHTS: The software and documentation were developed entirely at private expense and are commercial computer software and commercial computer software documentation within the meaning of the applicable acquisition regulations. Accordingly, pursuant to FAR 48 CFR and DFARS 48 CFR , use, duplication and disclosure by or for the U.S. Government or a U.S. Government subcontractor is subject solely to the terms and conditions set forth in the license agreement provided with the software, except for provisions which are contrary to applicable mandatory federal laws. TRADEMARKS: The trademarks, logos and service marks ("Marks") used herein are the property of Mentor Graphics Corporation or other parties. No one is permitted to use these Marks without the prior written consent of Mentor Graphics or the owner of the Mark, as applicable. The use herein of a third- party Mark is not an attempt to indicate Mentor Graphics as a source of a product, but is intended to indicate a product from, or associated with, a particular third party. A current list of Mentor Graphics trademarks may be viewed at: The registered trademark Linux is used pursuant to a sublicense from LMI, the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide basis. End-User License Agreement: You can print a copy of the End-User License Agreement from: Mentor Graphics Corporation 8005 S.W. Boeckman Road, Wilsonville, Oregon Telephone: Toll-Free Telephone: Website: SupportNet: supportnet.mentor.com/ Send Feedback on Documentation: supportnet.mentor.com/doc_feedback_form Part Number:

3 Module 1: Introduction Objectives Design New Challenges Due to Nanometer Effects Simulation New Challenges Eldo Platform Industry Proven Circuit Verification Platform for Analog-Centric ICs Impractical Without Eldo Platform Quality & Reliability Verification Tools Environment Integrations Course Objectives Summary Module 2: Noise Objectives Noise Analysis Definition of Input Noise Noise Sources AC and Transient Noise Source Examples Creating a Noise Source From RMS or Peak-to-Peak Specs Added Noise Sources Noise Models for Resistors, Diodes, and BJTs Objectives AC Noise Analysis Overview AC Noise Analysis Definition NOISE at the Middle of the TRAN Objectives AC NOISE Results I

4 Formatting AC Noise Results AC Spot Noise Figure (SNF) Measurement Objectives Noise in Eldo SSTNOISE /.PNOISE vs..noise PNOISE vs..sstnoise Why a Transient Noise Analysis? Transient Noise Advantages Noise Summary Summary Module 3: Transient Noise Analysis Objectives Transient Noise Algorithm NOISETRAN Analysis on Amplifier Noisetran Result Transient Noise Analysis Results Example of Noisy Trajectories With MRUN Objectives Transient Noise Analysis Syntax Typical RMS(t) Output TSTOP Value From the.tran Command NBRUN Number of Runs for RMS Noise Output Limitations of Single Run Algorithm (When MRUN Is Not Used) MRUN Use Multiple Runs Algorithm II

5 FMAX: Main Factor to Increase Accuracy for RC circuit FMIN: Algorithms Selector New Transient Noise Algorithm (FMIN>0) Transient Noise Algorithm (WHITE_NOISE_SINC) White Noise With Fmax=10Ghz & 5GHz Speeding up Transient Noise Analysis Transient Noise in Eldo Premier Extract Noise Commands Objectives Comparing Different Noise Results AC NOISE Analysis on Amplifier SSTNOISE Analysis on Amplifier Which Settings Are Important? Transient Noise Summary Lab Time Summary Module 4: Noisetran Results Objectives Phase Noise and Jitter Noise Modeling Long Term Jitter Introduction Long Term Jitter Definition Long Term Jitter Assumptions Long Term Jitter Long Term Jitter With 1/f Noise III

6 Other Useful Jitter Expressions Phase Noise L(f) Definition L(f) : PSD of the Output Signal SPHI(f) Definition L(f) and SPHI(f) Phase Noise Quantities Computing Long-Term Jitter From Phase Noise Jitter for PLLs Clock Recovery PLLs General Case Objectives Measuring PLL Phase Noise Spectrum Through.NOISETRAN Transient Simulation Until PLL Steady-State Phase Noise and Jitter From.NOISETRAN Results in EZwave Jitter From.SST Results in EZwave Jitter Toolbox in EZwave Tools > Jitter Examples Objectives SSTNOISE Measurement PHNOISE Results:.NOISETRAN Versus.SSTNOISE Measuring PLL Jitter Through.SSTNOISE Long-Term Jitter Measurement in EZwave Versus LT_JITTER From.SSTNOISE Analysis Objectives Output Noise Analysis SamplePSD() IV

7 Simple RC Circuit DB(sqrt(samplepsd())) vs. DB(ONOISE) Default Parameters SamplePSD() Parameters SamplePSD() Influence of nfft Parameter SamplePSD() for a Switched Capacitor Circuit NOISETRAN & SamplePSD() Relations Between Parameters Lab Time Summary Module 5: Fast Fourrier Transform Objectives Digital Signal Processing Topics Fast Fourier Transform FFT FFT Generalities FFT of a Periodic Signal FFT of a Non Periodic Signal FFT in Eldo and EZwave Summary of Main Parameters Simulation Parameters for FFT Simulation Parameters for FFT Example FFT Inside ELDO FFT Example FFT Waveforms FFT Example FFT: DISPLAY_INPUT= FFT Example Results V

8 Objectives Digital Signal Processing (DSP) Inside ELDO PSD Models Objectives DSP in EZwave Lab Time Summary Module 6: Scattering Parameters Objectives Scattering Parameters Roles S Parameters Generalities S Parameters Major Applications S Parameter Flow Objectives Matrix Representation of Linear Circuits S Parameter Extraction Definition S Parameter Result Output S Parameter Extraction Results (AC Analysis) Reuse an Existing S Parameter File in Eldo Objectives Touchstone Data Format If You Don t Have Access to Touchstone Viewer S Parameter Model Quality Issue Touchstone Viewer Check List VI

9 CITIfile Data File Format Fitted-Pole Models (*.pls) Objectives Transient Simulation is Challenging Preparing Data for Time Domain Declare FBLOCK to Use S Parameter File CPF Advantages Passivity FORCE_PASSIVITY Objectives Specific S Parameter Measurements Objectives Mixed Mode S Parameters Overview Mixed Mode S Parameter Extraction Mixed Mode S Parameters Simulation Mixed Mode S Parameters Simulation Results Lab Time Summary Module 7: Conclusion Objectives Eldo Platform Summary Release Conventions What About the Next Releases? Mentor Graphics Support VII

10 Documentation Search Results Example Stemming Support Summary Appendix A: Multiple Models: Eldo, Spectre, Hspice Objectives Model Libraries Introduction Model Library Syntax MOS Model - Binning More and More Effects Are Included Model File Selection Library Overview INCLUDE Command INCLUDE and Monte Carlo Simple Definition With.LIB Library Definition With.LIB KEY Delete Library With.DEL Basic Library Encryption Advanced Library Encryption IP Protection for the Foundry IP Protection for the User Objectives Using Behavioral Verilog-A Models Within Eldo Use of a Verilog-A Model in a Netlist VIII

11 Example - Verilog-A Model in a Netlist Hierarchical Verilog-A Model Example Verilog-A Model Example Generic and Param Usage Compilation Case of Compiled Library Not in the Current Directory CommLib QuickStart Verilog-A HDL Command for VerilogA as X-Statements Objectives Spectre Compatibility Spectre Language Support Overview Working With Multiple Languages Spectre Eldo Hybrid Mode Objectives HSPICE Compatibility Mode Hybrid Compatibility Mode Appendix B: EZwave Essentials Objectives Quick Reference Card Basic EZwave Features A True Mixed-Signal and RF Waveform Viewer EZwave Viewer Features at a Glance EZwave Graphical Post-Processing Getting Started Tutorials IX

12 Objectives Invoking EZwave EZwave Integration in Artist Link How to Start EZwave in Artist Link Joint Waveform Database (JWDB) wdb and.swd Files Loading Databases Searching Databases EZwave - Waveform List Filtering Plot Windows and Workspaces Zoom Strokes Various Cursors Types Cursors Example Waveform Groups Grouping Example Plot Difference Plotting Wave_1 vs. Wave_ Plotting Measure vs. Parameter Waveform Representation EZwave Configuration Documentation Color Scheme Objectives Pick-Point Tool Presentation X

13 Pick-Point Tool Example Pick Points Capabilities Pick Points Default Settings Pick Points Specific Behavior Measurement Tool Presentation How to Use Measurement Tool Measurements Tools Capabilities Waveform Calculator Introduction Waveform Calculator Layout EZwave Calculator Features Calculator Window Calculator Mouse and Key Binding Appendix C: EZwave Advanced Objectives Parametric Analysis Waveform Types Smith Chart Statistical Analysis Multiple Runs (PVT, MC) Multiple Runs - Multiple Colors Multiple Runs Filtering a Large Multiple Run Database Eye Diagram Jitter Waveform Compare Presentation XI

14 Waveform Compare Example Waveform Compare Tool Setting Available Comparison Options Navigate to Differences Comparison Text Report Display Tolerance Tube Spectral Waveform Compare Edge Waveform Compare Plotting All the Waveforms With the Same Name Tandem Mode Example Tandem Mode vs. Iterative Simulation Objectives Scripting Environment TCL Scripts EZwave TCL Scripting TCL Scripting Loading/Saving TCL From UI TCL Scripting With Measurement Tool Window and Measurements Saving WFC TCL Scripting User Defined Functions XII