Addon Tutorial Drawings
are self-installing drawing folders that can contain layouts,
schematics, additional files and CHM help files that integrate
into the main LASI help. Simply unzip and run the executable.
Addons now also install their help files in a browser readable form in
the Lasi7/Help directory. This makes the download slightly larger but
lets you read the help text if you cannot read CHM files.
DRC file and design rule examples for PolyMUMPs MEMS
process. For more information and possible update, and to request design kits and libraries
go to http://www.memscap.com or
Requires LASI version 7.0.42 or later. Approx 75KB.
Basic device and schematic drawings used in associated textbook first chapters. Approx.
Drawings of MOSIS design rules and layer definitions. Approx.
A simple CMOS imager IC design project. This is preliminary but is
fairly elaborate and demonstrates methods for laying out and doing Spice
simulations of a large and unusual type of circuit design. Approx
Tutorial that shows how Spice Extraction can be done from a cell layout.
Formerly included in system install, now separate. Approx. 521KB.
Revised tutorial that shows how to use LasiCkt and LasiMx utilities to wire an
opamp from individual CMOS transistor cells. Approx. 672KB.
Tutorial that shows how to use LasiMx utility to wire an
opamp from individual MOS transistor cells. Formerly included in system
install, now separate. Approx. 875KB.
Tutorial that shows how to build a padframe cell and connect in test
circuits so that the full layout can be compiled and
simulated by applying power and signals only to the external pads. Contains
new examples. Approx. 262KB.
Mississippi State's original cell library suitable for educational
use. It has been reworked for MOSIS SCMOS
and SCMOS SUBM with stackable or non-stackable vias and for and
Spice simulation. The cell layout names now have an "_se"
suffix for Submicron, Extended (metal). Approx.
Note: The MsuLib cells may not meet
the latest MOSIS design rules sections 5 and 6. Check with MOSIS
if the library dimensions will still pass. Alternate DRC files are
Although outdated, the 2UCHIP CN20
design example is still popular. The 2UCHIP download has been
completely revised to work with the latest versions of LASI. The
Zip file contains a self-installing executable. Approx. 426KB.
Up_down_setup.zip Up_down counter circuit originally available from
This is a tutorial to show alternate
ways to compile a layout or schematic into a Spice circuit file and how
to do an LVS. Approx. 195KB.
Character fonts update for LASI drawing and layout text. Contains two
new fonts that can be used to put text on a device or IC layouts when
smashed to polygons and scaled large enough to pass DRC tests. Installs
over the current \Lasi7\Chars subfolder and should place a
"Chars" icon on the
desktop. Read the Readme.txt file in
\Lasi7\Help\Charshelp. Approx 141KB..
CN20 process design rule drawings and examples. Obsolete -- Do not use for new
designs, but educational. Approx.223KB
Examples of logic cells and their schematics. Layout cells are basic
device layouts and will not Spice compile with Lasi unless device models are added.
Schematics include devices and are able to be Spice compiled. Approx.300KB
This is the link to MOSIS SCMOS Rules PDF file. To find design
rules for the process you are using (SCMOS, SUBM, DEEP) select the diagram of
the rule by layer or rule number. This is a nice PDF document that
formerly had to be viewed one rule at a time.
Documents and Software
Mississippi State's documentation for MsuLib
cell library. This has been translated from UNIX to a Windows
condensed help metafile (CHM) file. Approx. 1.85MB
Dxf_14.zip AutoCAD's write up of DXF
format condensed into a single CHM file. Approx. 104KB.
Original CIF documentation by Sproull and Lyon in PDF format.
Slightly out of date Simon Harpham's step by step introduction for
using LASI. If you have not used CAD systems for IC development
in general, and are just starting to use LASI, many things may
be confusing. Reading this should help greatly.
This is a link to a Spice
simulator. WinSpice is available free, but after 30 days might reduce its
capabilities unless you purchase a license. It will still be useful for
moderate size circuits. Most of the tutorial circuits available from this
site have been tested with the old version of Winspice 1.05.07 that does not
For student use you might try Ngspice that is available for free
from Sourceforge.net, We have noticed that some large and
complicated LASI tutorial circuits
may not give exactly the same results as Winspice. We have also noticed
that for Sourceforge downloads you might need Firefox
or IE9 or later.
http://www.cmosedu.com/cmos1/winlasi/lasiproj/scells.htm Our main page at cmosedu.com
for IC design course related materials. Maintained by R.J.Baker.
Windows LASI page at cmosedu.com where you can download
sample layouts. Maintained by R.J.Baker.
Link to Cornell's Spie Handbook section describing GDSII format.