Spice primitive library for ASIC design with gEDA.

All the symbols in this library are part of gEDA and are licensed
under the GPL.

The intention of this library is to give the interested 
user some examples of the mostly used components in CMOS design.

Contributions of other symbols or comments are welcome.

Contact:
Peter Kaiser
peter@easy-asic.de
http://www.easy-asic.de

For more information about the schematic editor look at:
http://www.geda.seul.org
For more information about the netlister "gnet-spice-sdb.scm" look at:
http://www.brorson.com/gEDA/SPICE/

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27. Dec. 2003, V 1.0, first release
03. Jan. 2004, V 1.1, different versions for cap and res
25. Apr. 2004, V 1.2, pads added, spice-sdb has no method for extrac-
                      ting pads, they appear as not valid!
07. Jun. 2004, V 2.0, all spice primitives are renamed to start with
                      "asic-" to avoid name clashes.
		      international resistors added.
		      some attributes are changed to get better spice
		      compatibility
02. Jan. 2005, V 2.1, test procedure for released symbols added

----------------------------------------------------------------------




The following attributes are used for spice symbols:

device: Determine method for netlister
model-name: pointer to model in ASIC technology library
refdes: R1, M4, ...
pinnumber: comment only
pinseq: Order in Spice netlist
value, w, l, ...: parameters for simulation


Example diode:

The following attributes:
device=DIODE
refdes=D3
model-name=dnw
area=10e-12
description=diode NWELL / PSUB

Generates the following spice code:
D3 an ka dnw 10e-12




The following attributes are used for pad symbols:

device: Always "pad"
refdes: Use P?, this ends up in unknown component with spice-sdb

Example pad:
device=pad
refdes=P1





Symbol Test for released symbols when a new release comes:

The schematics are copied to 00_golden_test. The name refers to the
name of the library (e.g. asic).
a) Load the schematic and visually check it against the original postscript
b) gnetlist -v -g spice-sdb -o asic.cir asic.sch
   sdiff asic.cir asic.cir.golden


Symbol Test for not released symbols:

To test the symbols, a test directory is in each symbol library. Use the
following line in gschemrc and gnetlistrc:

(component-library "..")

If you can see all the symbols in the test schematics and the extracted 
netlists agree with the golden netlist, the installation is ok.





Have fun