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HSPICE TUTORIALHSPICE TUTORIAL
Department of Electrical Engineeringp g g
The University of Texas at Dallas
Updated on February 2nd 2010
Contents
Introduction
H t S tHow to Setup
How to Run Hspice
How to Run WaveView
Example 1p
Example 2
A di 1Appendix 1
Appendix 2
Slide # 2
Introduction
This tutorial introduces the Hspice and SpiceExplore/WaveViewer to perform some basic circuitSpiceExplore/WaveViewer to perform some basic circuit simulations.
• Hspice
Circuit Simulator
• SpiceExplore/WaveViewer
Hi h R l ti W f ViHigh Resolution Waveform Viewer
Slide # 3
How to Setup
Slides(#4 ~ 5) show how to setup environment for starting Hspice and SPICE Explorer/WaveView.Hspice and SPICE Explorer/WaveView.
• First of all, log on to the UNIX workstation using your user ID and Password.
Aft l i C l Wi d d t• After logging on, open a Console Window and create a directory called “project” in your home directory. The project directory is to store process parameters and Hspice source files.
Slide # 4
How to Setup
• Launch a web browser and visit the course website to download a TSMC 0.35um technology model file for Hspice simulationHspice simulation.
Cli k th M d l D l d d th “ t t”Click the Model Download and save the “cmos.txt”
file in your “project” directory.
Slide # 5
How to Run Hspice
Next, let us learn how to run Hspice
• Open the Console Window and type the following command.
“You have to do this every time you want to start Hspice”.
• Type the following command in your UNIX prompt to• Type the following command in your UNIX prompt to run Hspice with source file “example1.sp”.
Slide # 6
How to Run Hspice
• Hspice will read “example1.sp” and run the simulation. A l fil “ l 1 li ” ill b t d ft thA log file “example1.lis” will be generated after the simulation.
• “hspice job concluded” will be shown if the simulation is done properly.
Slide # 7
How to Run Hspice
• If you see error message something like the following,If you see error message something like the following, you should open the generated “.lis” file in order to check what is an error.
Slide # 8
How to Run SPICE Explorer/WaveView
SPICE Explorer/WaveView provides a convenient graphical interface to display, analyze, and print results of Hspice simulations.
• Type “source /home/cad/synopsys_2007.12/testprofile” “You have to do this every time you want to startYou have to do this every time you want to start
SPICE Explorer/WaveView ”.• Type “sx &” for SPICE Explorer or “wv &” for WaveView
in a command prompt. A new window will be shown ifin a command prompt. A new window will be shown if your environment is set correctly.
SPICE Explorer gives an overview of the circuit your spice file describes and views the waveforms you p ysimulated.WaveView could only view the waveforms you
simulated. This tutorial will focus on WaveView.
Slide # 9
Start Window of WaveView
WaveViewWindow
Slide # 10
How to Run WaveView
• Click “File” and “Import Waveform File” or use shortcut “ctrl+o”. An “Open Waveform Files” window will be shown.
Open WaveformOpen WaveformWindow
Choose “Waveform Files.*”
• Select “example.sw0” and click “OK” in Open Waveform window.
Slide # 11
How to Run WaveView
• After that, the waveform file will be shown.
Opened Waveform List
WaveformSignal
SelectionWindow
Waveform Browser
• Double click “i1(m1)” to open waveform.
Slide # 12
Example 1
The following figures show an example regarding to NMOS Transistor DC Operation. Left one shows a schematic, and right one is a text file associated with the schematicright one is a text file associated with the schematic.
Slide # 13
Example 1
To create “.sp” file, open a UNIX Console Window and type “nedit” or “pico” in your command prompt Both of them arenedit or pico in your command prompt. Both of them are well-known text editors in UNIX environment.
After opening a text editor, type the previous example source code and save as “example1.sp”.
Next, run Hspice.
If the simulation is successful, run WaveView and check the result waveform.
Slide # 14
Example 1
The following provides a brief explanation about the “example1 sp” source code:example1.sp source code:
• The first line of the source file can be read by Hspice asThe first line of the source file can be read by Hspice as a comment. However, WaveView reads the first line as the title of the simulation.
• There are 3 elements in the circuit: “m1”, “vgs”, and “vds” Note that Hspice syntax is NOT case sensitive;vds . Note that Hspice syntax is NOT case sensitive;
e.g. vgs=vGS=Vgs
Slide # 15
Example 1
• You should give each node a name. you can use any number for node name assignment or give somenumber for node name assignment or give some meaningful names for the important circuit nodes such as “vin” and “vout”.
• The node with name “0” is used as global ground terminalterminal.
• Please remember adding an empty line after “ end” inPlease remember adding an empty line after .end in the source file, otherwise Hspice will run abnormally.
Slide # 16
Example 1
There is some useful information in the “.lis” file.
• Open the “example1.lis” file and check DC Operating Point and MOS Operation Information.
Slide # 17
DC Operating Point MOS Operation Information
Example 2
The following figures show an example of a source code and schematic for Differential Amplifier with Resistive LoadsLoads.
Slide # 18
Example 2
The simulation result of Differential Amplifier with Resistive Loads.
Result from .DC Analysis
Slide # 19
Examples 2
Check DC operating point, transfer characteristics, and MOS operation information, using the “example2.lis” file.
DC Operating Point
Result from .TF Analysis
MOS Operation InformationTransfer Characteristics
Slide # 20
MOS Operation Information
Appendix 1: What is a Source File?
An ASCII text file called source file is needed to use with Hspice. Usually the source file has extension “.sp”. However there is no limitation in the file extensionHowever there is no limitation in the file extension.
Normally the source file contains circuit descriptionNormally the source file contains circuit description, simulation options, and simulation control. Please refer to “Hspice Manual” for the use of Hspice syntax in the source file You could find some example source files in thisfile. You could find some example source files in this tutorial latter.
ASCII mode must be used to upload the source files from PC to your UNIX account, otherwise Hspice cannot read th fil tl
Slide # 21
the source files correctly.
Appendix 2Appendix 2
Hspice Manual - A Quick Start
Slide # 22
Hspice Feature
Slide # 23
Type of Analysis
DC Analysis
Slide # 24
Type of Analysis
AC Small Signal Analysis (1)
Slide # 25
Type of Analysis
AC Small Signal Analysis (2)
Slide # 26
Type of Analysis
Transient Analysis
Analysis at Differential Temperatures
Slide # 27
Convergence
Slide # 28
Input Format
Slide # 29
Circuit Description
Slide # 30
Syntax of Hspice
This section provides a quick start of using Hspice, and syntax is simplified for beginner. Advanced and Detailed informationshould be referred to “Hspice Manual”should be referred to Hspice Manual .
Passive and Active Element
Slide # 31
Syntax of Hspice
Slide # 32
Syntax of Hspice
Slide # 33
Syntax of Hspice
Independent Source Elements
Slide # 34
Syntax of Hspice
Slide # 35
Syntax of Hspice
Slide # 36
Syntax of Hspice
Dependent Source Elements
Slide # 37
Syntax of Hspice
Analysis
Slide # 38
Syntax of Hspice
Slide # 39
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