Re: [Ngspice-users] ngspice error? now ngspice question?

[Fam. K. <die...@t-...>]

Hi David,

are you netlisting spice or spice-sdb?=20

spice-sdb is the much better one.

The vcvs expansion is for the user comfort. Without it you don't get the=20
current in and out of the vcvs source. In your case the node names are wron=
g=20
for any reason.=20

If you can't fix the problem with spice-sdb, let us know.


Peter





Am Dienstag, 8. M=E4rz 2005 22:06 schrieb Logan, David:
> -----Original Message-----
> From: Logan, David
> Sent: Tuesday, March 08, 2005 2:05 PM
> To: 'ngs...@li...'
> Subject: ngspice error? now ngspice question?
>
>
> Hello. I have entered this circuit into gschem, ran netlist,
> added entries manually to the netlist, and ran ngspice on it.
>
> The problem is that the values come out incorrectly.
>
>                 +------ 1ohm --------+
>
>                 |       [R6]         |
>                 |           -   +    |
>
>     +---- 4ohm -+- 2ohm --- <3v0> ---+------+
>
>     |     [R1]  |  [R5]     [E1]     |      |
>
>     +           |                    |      |
>     24V        2ohm                 8ohm   4ohm
>     -[V1]       |[R2]                |[R3]  |[R4]
>
>
>     +-----------+--------------------+------+
>
> I won't include the (geda) schematic, but I after I edit the netlist, I
> get: * Spice netlister for gnetlist
> * Spice backend written by Bas Gieltjes
> V1 4 0 DC 24V
> R4 0 1 4
> R3 0 1 8
> R2 0 3 2
> R5 3 2 2
> R6 3 1 1
> R1 4 3 4
> * begin vcvs expansion, e<name>
> E1 1 2 1 0 3
> i-sense-E1 1 0 dc 0
> i-out-E1 1 2 dc 0
> * end vcvs expansion
> .OP
> .PRINT I(R1) I(R2) I(R3) I(R4) I(R5) I(R6)
> .END
>
> I was originally going to ask why the calculations of the above come out
> incorrectly, but I have since discovered that if I remove the lines:
>
> i-sense-E1 1 0 dc 0
> i-out-E1 1 2 dc 0
>
> then I get the correct results. What are these lines, and why are they
> screwing up my spice run? And what seems to be even more humorous is that=
 I
> have to manually add the gain to E1, because gnetlist doesn't add it, but
> it does add these two lines that seems to mess up my run.
>
> David Logan
>
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