Re: [Help-gnucap] gnucap error

[Andy Fierman]

For info:

"Gnucap 2009.12.07 RCS 26.136"

is the same version as I'm running on my 64bit Linux Mint Debian
Edition. This is a rather nice rolling distribution based on Debian
Testing and I just installed Gnucap as a .deb straight from the Debian
Testing repos.

Cheers,

         Andy.

signality.co.uk

p.s. I despair AD's spice models. I've had so much trouble with so
many of them ...

:(




On 11 July 2011 17:30, Ramiro Aceves <address@hidden> wrote:
> Thanks Al, will try that!
> Ramiro
>
>
> El 11/07/11 05:03, al davis escribió:
>>
>> On Thursday 07 July 2011, Ramiro Aceves wrote:
>>>
>>> Now the error about the diodes disappeard. I can enter gnucap
>>> and have the warnings:
>>
>>> Rc2.X1: Rideal: effective length is negative or zero
>>> Re1.X1: Rideal: effective length is negative or zero
>>> Re2.X1: Rideal: effective length is negative or zero
>>
>>> When I simulate the circuit I get:
>>>
>>> gnucap>  tran
>>>
>>> #Time
>>> open circuit: internal node 54
>>> did not converge
>>>   0.
>>> very backward time step
>>> convergence failure, reducing (itl4)
>>> newtime=9.155273e-13  rejectedtime=1.831055e-12
>>> oldtime=0.000000e+00 using=1.000000e-12
>>> tried everything, still doesn't work, giving up
>>> gnucap>
>>
>> The warnings are the key to fixing the problem.
>>
>> Apparently, the resistors are not what you think they are.
>>
>> I did a quick check on what is happening here ...  That model is
>> implemented to an ancient Hspice spec .. where it's all
>> specified as length and width.  So, really, the resistors are
>> not what you think they are.
>>
>> Looking at your netlist .. you don't need the ".model"
>> statements Rideal or Rnoise .  Just leave them out, and also
>> leave out the reference to them.
>>
>>
>> There is also an issue with the zener diode.  The native model
>> doesn't do breakdown.  With the development version, use a
>> plugin for the diode model ..  from the spice models tarball.
>>
>> _______________________________________________
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>>
>
>
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