[Help-gnucap] PIN diode modelling

[vsrk sarma]

Thanks for the reply. I did install plug-in models suggested. But, I am not
clear how to utilize them.For example how should refer to PIN diode model &
its parameters in my circuit ? I notice  make process has placed foo.o files
& foo.so  in respective folders. Do I need to execute them to generate model
or just refer to them in my circuit model?

On Mon, Jun 8, 2009 at 9:30 PM, <address@hidden> wrote:

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>   1. Re: model for PIN diode in gnucap (al davis)
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> Message: 1
> Date: Sun, 7 Jun 2009 21:28:38 -0400
> From: al davis <address@hidden>
> Subject: Re: [Help-gnucap] model for PIN diode in gnucap
> To: address@hidden
> Message-ID: <address@hidden>
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> On Wednesday 06 May 2009, vsrk sarma wrote:
> > I am just starting to use gnucap for circuit simulation.
> > Can diode model generated in gnucap  b e used for PIN diodes?
> > I need to find a equivalent an obsolete & unavailable silicon
> > pin diode used in protection/attenuation front end of
> > amplifier. Target diode manufacturer provides following spice
> > model parameters: Is, Rs, N, Cjo, Cp, M, EG, Vj, BV, IBV. (In
> > gnucap Cp, BV, IBV are not used).......
>
> sorry .. I missed this ..
>
> If the native diode model doesn't have what you need,
> perhaps one of the plugin diode models will.
>
> In particular, take a look at the diode model from NGspice.  It's in the
> tarball:
> http://gnucap.org/devel/gnucap-2009-02-02-models-ngspice17.tar.gz
>
> The model from spice3f5 is also available, in:
> http://gnucap.org/devel/gnucap-2009-02-02-models-spice3f5.tar.gz
>
> > ......Are these sufficient to
> > simulate protection/attenuation behavior with pulsed VHF
> > input?
>
> I don't know.  The NGspice model appears to have more in it,
> so it would be  more likely to have enhancements like this.
>
> > Do the simulation take care of resistance &
> > capacitance variation due to space charge accumulation in i
> > layer?
>
> I think so.  They all model nonlinear capacitance.
>
>
>
>
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-- 
vsrk sarma