Script started on Tue 25 Oct 2005 07:36:02 PM EDT
bash-2.05b$        

# (Comments like this one were added later, and start with #.)
# I start off with just the inverter.mag file.
# The "inv_example.log" file is actually this script file.

bash-2.05b$ ls -l inv*
-rw-r--r--    1 cscmcw   wheel         698 Oct 11 20:37 inverter.mag
-rw-r--r--    1 cscmcw   wheel           0 Oct 25 19:32 inv_example.log


# Now I run magic. I will erase the label I used for the input, 
# and re-name it "Va".

bash-2.05b$ magic 

Magic 7.1 - Compiled on Wed Oct  5 17:55:16 EDT 2005.
CAD_HOME sets "~cad" to "/opt/cad/magic-7.1".
flock_list directory created.
Error opening flock_list/link.

Using technology "scmos", version 8.2.8.
MOSIS Scalable CMOS Technology for Standard Rules
Using TrueColor, VisualID 0x23 depth 24
Loading modules:
 [help] [box] [drc] [label] [draw] [stack] [prs] [gate] [sel]
Use scm-help ? for help on some scheme functions
:load inverter.mag
:erase label
:label Va
Moving label "Va" from space to polysilicon in cell inverter.mag.
:save
:extract
Extracting inverter into inverter.ext:
:quit

# Now I see that it created a .ext file.

bash-2.05b$ ls -l inv*
-rw-r--r--    1 cscmcw   wheel         755 Oct 25 19:34 inverter.ext
-rw-r--r--    1 cscmcw   wheel         694 Oct 25 19:33 inverter.mag
-rw-r--r--    1 cscmcw   wheel        1536 Oct 25 19:33 inv_example.log

# Convert the .ext file to a .spice file.

bash-2.05b$ ext2spice -f spice3 inverter
CAD_HOME sets "~cad" to "/opt/cad/magic-7.1".
Memory used: 130k

# Now see that we have a .spice file now.

bash-2.05b$ ls -l inv*
-rw-r--r--    1 cscmcw   wheel         755 Oct 25 19:34 inverter.ext
-rw-r--r--    1 cscmcw   wheel         694 Oct 25 19:33 inverter.mag
-rw-r--r--    1 cscmcw   wheel         288 Oct 25 19:35 inverter.spice
-rw-r--r--    1 cscmcw   wheel        2048 Oct 25 19:34 inv_example.log

# Here's an example of a way to include comments within a log file.

bash-2.05b$ echo Download inverter.cir from web
Download inverter.cir from web
bash-2.05b$ echo and edit it to work with my file.
and edit it to work with my file.

# The editing was done in a different window.

bash-2.05b$ !ls
ls -l inv*
-rw-r--r--    1 cscmcw   wheel        1149 Oct 25 19:36 inverter.cir
-rw-r--r--    1 cscmcw   wheel         755 Oct 25 19:34 inverter.ext
-rw-r--r--    1 cscmcw   wheel         694 Oct 25 19:33 inverter.mag
-rw-r--r--    1 cscmcw   wheel         288 Oct 25 19:35 inverter.spice
-rw-r--r--    1 cscmcw   wheel        2560 Oct 25 19:35 inv_example.log

# Now look at the inverter.cir info. 
# You'll notice that the file size is a bit different, as is the timestamp.

bash-2.05b$ ls -l inv*
-rw-r--r--    1 cscmcw   wheel        1147 Oct 25 19:37 inverter.cir
-rw-r--r--    1 cscmcw   wheel         755 Oct 25 19:34 inverter.ext
-rw-r--r--    1 cscmcw   wheel         694 Oct 25 19:33 inverter.mag
-rw-r--r--    1 cscmcw   wheel         288 Oct 25 19:35 inverter.spice
-rw-r--r--    1 cscmcw   wheel        3072 Oct 25 19:36 inv_example.log

# Here is the final .cir file. Notice the "Va" line.

bash-2.05b$ cat inverter.cir
inverter test
.include inverter.spice

.MODEL nfet NMOS LEVEL=3 PHI=0.700000 TOX=3.0600E-08 XJ=0.200000U TPG=1 
+ VTO=0.5666 DELTA=8.7630E-01 LD=9.0910E-10 KP=7.7684E-05 
+ UO=688.4 THETA=1.1640E-01 RSH=1.0310E+01 GAMMA=0.5904 
+ NSUB=1.3370E+16 NFS=5.9090E+11 VMAX=1.9740E+05 ETA=9.3470E-02 
+ KAPPA=2.1020E-01 CGDO=5.0000E-11 CGSO=5.0000E-11 
+ CGBO=3.1008E-10 CJ=2.7477E-04 MJ=5.5020E-01 CJSW=1.9263E-10 
+ MJSW=1.0000E-01 PB=9.9000E-01 
* 
.MODEL pfet PMOS LEVEL=3 PHI=0.700000 TOX=3.0600E-08 XJ=0.200000U TPG=-1 
+ VTO=-0.7996 DELTA=2.4370E+00 LD=1.1000E-09 KP=1.8891E-05 
+ UO=167.4 THETA=9.5600E-02 RSH=1.0210E+01 GAMMA=0.3265 
+ NSUB=4.0890E+15 NFS=7.1500E+11 VMAX=1.2590E+05 ETA=8.2820E-02 
+ KAPPA=5.5040E+00 CGDO=5.0000E-11 CGSO=5.0000E-11 
+ CGBO=3.2338E-10 CJ=2.8023E-04 MJ=4.6284E-01 CJSW=2.1036E-10 
+ MJSW=1.2846E-01 PB=9.0211E-01 
* 
* supply voltages 
* 
Vgnd GND 0 dc 0 
Vdd Vdd 0 dc 5 
* 
* input voltage source: 

Va Va 0 PULSE(0 5 5n 1n 1n 10n ) 

* analyses request 
*.dc Vin 0 5 0.004 
.tran 0.01n 40n 
*.tf v(out) Vin 
*.ac dec 10 10 1000meg 
* 
* options 
.options abstol=1uA vntol=1mV reltol=0.01 

.PROBE

     
.end 

# Now let's simulate this circuit with Spice.

bash-2.05b$ spice3 
Note: can't find init file.
Program: Spice, version: 3f4
Date built: Sun Nov 18 23:28:11 BRST 2001
Spice 5 -> source inverter.cir

Circuit: inverter test

Spice 6 -> run
Warning: va: no DC value, transient time 0 value used
Spice 7 -> plot va Voutput
Spice 8 -> quit
Warning: the following plot hasn't been saved:
tran1   inverter test, Transient Analysis

Are you sure you want to quit (yes)? yes
Spice-3f4 done
bash-2.05b$ exit

Script done on Tue 25 Oct 2005 07:49:04 PM EDT

# The above "plot" command brought up a nice window, which showed the output
# behave like I expected for the input.
# You can capture this window with a graphics utility program like "xv".
# The workstations have a program called "gimp" that also allow you to
# grab the image and save it as file. You may need to do this to print it
# out.