Re: [Ngspice-devel] Fwd: CPL lines

[Holger V. <hol...@un...>]

Lionel,

cpl (and txl) have been implementd, but with an error in 
/frontent/inpcom.c. The attched patch will correct the error.

--- /d/Spice_general/ngspice_cvs_cyg/src/frontend/inpcom.c    Mon Dec 31 
13:12:37 2007
+++ inpcom.c    Thu Feb  7 00:43:01 2008
@@ -2675,9 +2675,12 @@
   case 'u': case 'j': case 'z':
     return 3;
     break;
-  case 't': case 'o': case 'g': case 'e': case 's': case 'm':
+  case 't': case 'o': case 'g': case 'e': case 's': case 'm': case 'y':
     return 4;
     break;
+  case 'p':
+    return 6;
+    break;     
   case 'q': /* recognition of 3/4 terminal bjt's needed */
     i = j = 0;
     while ( (i < 10) && (*c != '\0') ) {

There is an error in bidir.net, line 33:
CPLT202 -> CPL202
Running the example yield another error message:
(Error) The capacitance matrix of the multiconductor system is not 
positive definite.

While the patch allows to run your example, there are others which still 
have the problem
(e.g. /tests/transmission/cpl_ksp.cir). Here the cpl definition does not 
have 6, but 10 nodes. Thus the function 
comment_out_unused_subckt_models( struct line *start_card )  in inpcom.c 
will replace .model ... with *model ..., and the model is not found. We 
have to put in more thoughts for a universal patch.


Regards

Holger




Lionel Sainte Cluque schrieb:
> Hi
>
> I tryed to use cpl line models, but it seems not to work, or be
> implemented. Is that right.
> When I source my model file (lines.cir) and ask for a listing, ngspice
> only reports me the .End line.
>
> There is a CPL directory in the source tree, but perhaps it is not
> implemented, tested or debugged yet.
>
> here is the results I get for "source":
> Error on line 31 : p1 0 n046 n045 0 n059 n050 cpl202 len=16m
>          unable to find definition of model cpl202 - default assumed
> Error on line 33 : p2 0 n021 n025 0 n045 n046 cplt202 len=16m
>          unable to find definition of model cplt202 - default assumed
> Error on line 98 : p4 0 n059 n050 0 n058 n056 cpl202 len=1.5m
>          unable to find definition of model cpl202 - default assumed
> Error on line 157 : p3 0 n045 n046 0 n014 n026 cpl202 len=1.5m
>          unable to find definition of model cpl202 - default assumed
>
> When I execute "run", ngspice crashes (there is only the first line):
> Doing analysis at TEMP = 27.0000 ...
>
> I am running on a PC computer with microsoft windows XP and ngspice080127-2
>
> (commands:
>   source bidir.net
>   run
> )
>
>