Transcript Magic/IRSIM/Hspice Tutorial - University of Southern

EE 577a - VLSI System Design
Introduction to
Hspice & mWaves
Spring 2001
Instructor: Dr. Sandeep Gupta
Adapted by Amit Chowdhry
Hspice
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EE 577a - VLSI System Design
• Hspice is:
– A transistor level simulator
– Used to perform comprehensive circuit analysis
– A text mode simulator
• Mwaves is:
– A graphical interface to view the results
generated by HSpice
Hspice
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EE 577a - VLSI System Design
Hspice Set-up
If you did setup for Magic, you don’t
need to do anything for Hspice.
< Correct path >
which hspice  /usr/usc/hspice/2002.1/bin/hspice
Hspice
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EE 577a - VLSI System Design
We have the
inverter layout
already (inv.mag).
Make inv.ext file
using :ext
command.
Hspice
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EE 577a - VLSI System Design
Simulation
1) Convert the .ext file to .spice: ext2spice inv
2) Edit the file inv.spice: pico inv.spice
(or any text editor, such as vi, emacs...)
-------------------------------------------------------------------------------------* HSPICE file created from inv.ext - technology: scmos
.option scale=0.2u
m0 out in Vdd Vdd pfet w=12 l=2
+ ad=60 pd=34 as=60 ps=34
m1 out in GND GND nfet w=4 l=2
+ ad=20 pd=18 as=20 ps=18
C0 Vdd GND 2.1fF
** hspice subcircuit dictionary
Hspice
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EE 577a - VLSI System Design
3) Add the following lines at the end of your file:
.option post
.include tsmc35.spice
VVdd Vdd Gnd 3.3v
VGnd Gnd 0 0v
Your input
node label!!!
Vin in Gnd pulse(0v 3.3v 3ns 0.1ns 0.1ns 3ns 9ns)
.tran 0.1ns 20ns
.DC Vin 0v 3.3v 0.1v
.end
Be careful: just one ‘Enter’ after .end line
4) Save and exit pico.
5) Run Hspice: hspice inv.spice
6) Run mwaves: mwaves &
Hspice
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EE 577a - VLSI System Design
7) Open inv.st0 file in the
menu (Design:Open…).
If you can’t see your .st0 file,
click Filter menu in
Open Design Window.
You should check Listing tab
as well as Input tab.
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EE 577a - VLSI System Design
8) Click your result data in Results Browser window.
Transient: * hspice file created from inv.ext - ……
DC: * hspice file created from inv.ext - ……
9) Click Types. (Voltages or Currents)
Hspice
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EE 577a - VLSI System Design
Hspice
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EE 577a - VLSI System Design
10) Select a curve with the left mouse button and drag it with
middle button to the panel in the main window. Or double click!
Useful menu  Panels, Measure, Tools
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EE 577a - VLSI System Design
11) Printing
Tools:Print...
Hspice
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EE 577a - VLSI System Design
• Explore other links provided on class
website to get acquainted with more
command – especially look at different
ways to apply stimulus and how to specifiy
sub-circuits and save yourself some
gruntwork while you do your labs.
Hspice
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EE 577a - VLSI System Design
• Nice Tutorials
– www-scf.usc.edu/~ee577/cad_frame.html
in the Tools menu.
*Digital Circuit Simulation Using HSPICE
*HSPICE Handout from Fall99 EE577a
– Simple & easy tutorial of mwaves…
http://www.eos.ncsu.edu/eos/info/ece/ece213_info/www/spice/mwa
ves.html
• Extensive Hspice Manual
– www.ece.orst.edu/~moon/hspice98/
Hspice
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