Re: gEDA-user: Bug or feature?

[Peter Kaiser <peter@xxxxxxxxxxxx>]

Hi John,

>
> Another suggestion:
>
> Would it be possible to define (preferences) a default directory for
> models and subcircuits? That way it would not be necessary to define the
> entire path in each of the components. To remain compatible, I'd suggest
> that 'file' attributes starting with / be absolute, else use the default
> directory.
>


Wouldn't it be useful to work with variables like â$lib/model_xyâ
The variable must be defined in a setup file or in the shell.

But this requires programming work. So far, until this is done, I can show you 
my way. I use the âspice-includeâ symbol and add to the file attribute 
<name>.spc.
This file includes all the models and simulation command. All you need in your 
schematic is a single symbol.  You can run ngspice in batch mode. 

An example is attached.

Peter


*----------------------------------------------
* <filename>.spc; Spice comand file
* include this to your spice netlist
* later this might be derived from sim.cmd
*----------------------------------------------
* Change Log
* 06. Feb. 2005 -- V 1.0 start hacking
*


* semiconductor model library
*.include /home/peter/gEDA/library_spice/open_tech_lib/peter.lib
*.include /home/peter/gEDA/library_spice/open_tech_lib/level_1_short.lib
*.include /home/peter/gEDA/library_spice/open_tech_lib/level_3_typ.lib
.include /home/peter/gEDA/library_spice/XFAB_XC06_primitive/models_tt.lib
*.include /home/peter/gEDA/library_spice/700/??

* semiconductor macros
*.include /home/peter/gEDA/library_spice/XFAB_XC06_cells_analog/aporc02_subcir.spc
*.include /home/peter/gEDA/library_spice/XFAB_XC06_cells_digital/AND2LX1.spc

* options
*.OPTIONS temp=25
*.OPTIONS gmin=1e-12

.control
*set xxx=2
*echo $xxx
set filetype = ascii
foreach n 0 1 2 3 4 5
 echo n
 alter vgs = $n
 dc vds 0 5 0.1
 plot -i(vds)
 write $n i(vds)
end
*************
*dc vds 0 5 0.1
*plot -i(vds)
*alter vgs = 2V
*dc vds 0 5 0.1
*plot -i(vds)
*************
*  foreach tempval -20 0 20 40 60 80 100 120 140
*    set temp=$tempval
*    op
*    print vbgp
*  end
.endc


*------------
* analysis
*------------

* operating point
*.op

* dc tranfer
* .dc <quelle> <start> <stop> <step> <<quelle2> <start> <stop> <step>>
*.dc vds 0 5 1 vgs 0 5 0.1
*.dc vds 0 5 0.1
*.print dc i(vds)

* transient
* .tran <tstep> <tstop>
* .tran 100n 50u

* small signal ac


************
* debug
************

* show
* showmod
* trace
* step
* nodeset
* ic