Re: [Help-gnucap] [Fwd: [Fwd: Open node in transistor circuit]]

[Rubén Gómez Antolí]

Hi all,

I'm still having troubles with this list.

I revised archived mail for this list and I can view that this mail
don't come.

I hope that not come twice.

Salud y Revolución.

Lobo.

Rubén Gómez Antolí escribió:
> Hi all,
> 
> First of all, sorry about "big" delay to answer, I was a time which I
> don't work on these practice.
> 
> And, I having some issue with this list, mails don't become to my
> account, but comes to the list.
> 
> O.K, go to the problem.
> 
> Al Davis wrote on 11 October 2006:
> 
>> On Thursday 28 September 2006 12:45, Rubén Gómez Antolí wrote:
>>> I'm simulating a circuit with a transistor. When I change the
>>> value of power supply I get a "open circuit:internal node".
>>>
>>> The circuit runs well on ngspice, I don't know about what I
>>> doing bad.
>> It works for me.
>>
>> That "open circuit" message isn't always a problem.  It means
>> there was a matrix singularity, which could be during iteration
>> and not a final result.
>>
>> "open circuit" means that there is a high impedance at a node,
>> so high that it is impossible to calculate a voltage.  For
>> example, think of two capacitors in series.  What is the DC
>> voltage at the junction?  it's unknown!
>>
>> I don't see anything like that for your circuit, but when not
>> converged anything can happen.
> 
> Well, I don't explained well the problem. Circuit doesn't simulate,
> output file is 0 size or the waves output hold the same value after a time.
> 
> I attach a session file which you can see the problem.
> 
> I try to download gnucap cvs version but I can't find it, where I can to
> obtain it?
> 
> I remember you that my gnucap version is that Debian Sid version have:
> 
> ii  gnucap                              0.35-1
> 
> Thanks for your attention.
> 
> Please, send me a copy in your answer, the list issue....
> 
> Salud y Revolución.
> 
> Lobo.

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