What is LASI ?
LASI (LAyout System for
Individuals) is a "general purpose" layout and
design system originally intended for integrated circuits. It is
versatile enough that it can be used for ICs, MEMS, discrete
devices, schematics, PC
boards and project documentation drawings. LASI is freeware.
LASI is a
traditional Win32 application that should install and run on Windows versions XP, Vista,
7 or 8.1, and Windows 10 if it fully supports Win32 programs. Windows 7
is currently preferred. LASI should also run with some limitations on most Linux systems using
the Wine translator.
LASI is NOT intended for commercial
use. When submitting actual designs for processing approved commercial software should be used.
LASI is intended for students.
It teaches a better understanding of
what you are really doing. To use LASI, you need to know something
about your technology, the physics involved, have some circuit
intuition, and not just know how to run
software. It is for people who still consider IC design something of
LASI also runs portably. You
can install the system on a flash drive or other removable drive and
work on drawings also stored on that same drive. Portable
operation lets you do work on any convenient PC without leaving any
files on that PC. This is
handy for presentations and for student projects.
Drawings are built from
hierarchical cells stored as individual TLC (Transportable Layout Cell)
files. TLC files can be easily traded between different drawings. TLC
files are in basic XML format.
LASI also has a script command
language. This is a simple text file of drawing edit commands that can
be individually written to create drawing figures, complete cells, or anything that could be difficult to draw by hand.
LASI consists of a main drawing editor and several
"utility" programs. These utilities include a user programmable bitmap based DRC, a basic
matrix router, and a Spice netlist compiler that extracts Spice circuit files
from both schematic and layout.
The utilities also include GDS, CIF
and DXF format converters, Since the LASI drawing structure is
fairly similar to GDS, drawings can be archived in GDS. Since most other CAD
systems can read GDS,
drawings can be moved to other CAD systems if desired, or if LASI is not available.
LASI does not do Spice simulations. There are good Spice simulators available already.
Spice simulations can be quite customized and are better not integrated
into LASI. Most simulators can run directly out of the main editor or
the Spice compile utility.
For anyone who is not familiar
with LASI or its utilities there is a large built-in Help file system.
the design rule checker has been revised to have a more intuitive
setup procedure. It should be still be compatible with older DRC files.
files have been updated to better explain parameters Distance and Resolution
in DRC files.
DEC errors were found in the Imager Addon. These are fixed.
been permanently turned off since they often cause unnecessary redraws on some
versions of Windows. Pressing F1 and clicking a command button reads a
more complete Help item for that button.
changes to the main editor and most utility programs.
have been recompiled so that any recent changes will be included.
can now be hidden or shown using the Cnfg command by checking
or unchecking "Hide All Tooltips.". This is applied immediately without
having to restart LASI.. Tooltips can cause annoying redraws on some versions
timing has been adjusted slightly.
changes to utility programs.
changes to Help files and web pages .