Re: gnucap error

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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