Re: [Qucs-devel] Exporting netlists

[Claudio G. <cla...@vi...>]

Hello,
as far as I know the 4th connection of the BJT model is the substrate and for 3-terminal BJTs it's always shorted to the collector. Qucs has also symbols for BJT with the substrate connection available.

Regarding "gnd", it's the only net with a special name, as far as I know. Note that any net (wire) on the schematic can be given a label, which will be used in the netlist, so if you label a wire "mygnd" you'll find a net with this name there (and if you label a net "gnd" it will be connected to ground).
Only the unlabeled nets are assigned a name starting with "_", AFAIK.

Regards,
  Claudio

> Il 9 aprile 2020 alle 14.56 Chris via Qucs-devel <quc...@li...> ha scritto:
> 
> 
> That confirms what I thought. I have written something robust enough to 
> deal with this, but I wanted to be sure that my guesses were correct.
> Thanks Thomas!
> 
> I have already posted the questions below, but since I now have your 
> attention :)
> 
>     1) This component line in a sim file refers to the same net twice,
>     that doesn't look right to me.
> 
>     BJT:T1 _net16 *_net17* _net18 *_net17* Type="npn"
> 
>     2) In the component lines in a sim file, the net names appear to
>     start with '_net', but there is also 'gnd', are there any other
>     special net names like this?
> 
> I'm hoping these are the last questions, as the script is working apart 
> from problems with (1).
> 
> Chris
> 
> 
> 
> On 09/04/2020 1:45 pm, Thomas.lepoix wrote:
> > I don't remember having ever found a documentation about the netlist format.
> >
> > As far as I know, each line follow the same model :
> >
> > type:label net property="value"
> >
> > net fields are "wire" labels, for example, in the following sequence there is a wire that connects the second port of the diode D1, the first port of D2 and the first port of D3.
> >
> > Diode:D1 _net0 _net1 Is="1E-11" N="1.27" Rs="3.858 ...
> > Diode:D2 _net1 _net2 Is="1E-11" N="1.27" Rs="3.858 ...
> > Diode:D3 _net1 _net3 Is="1E-11" N="1.27" Rs="3.858 ...
> >
> > property fields are also present in the .sch file.
> >
> > It seems to me that def paragraphs wrap subcircuits. "Z_Diodes_1N756" is a particular model of diode. So this library component is a subcircuit wrapping a classic diode component with particular properties.
> >
> > "PVR100AZ_B12V_mod" is a more complex library component so it wraps another subcircuit "PVR100AZ_B12V" with its own def paragraph and then used through the "sub" component. that's why defs can be nested, a def contain a piece of schematic.
> >
> > however that is true that the file indentation is rather strange.. I guess your parser have to be robust enough to this kind of randomness.
> >
> >
> > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> > On Thursday 9 April 2020 00:13, Chris via Qucs-devel <quc...@li...> wrote:
> >
> >> Files created using qucs -i filename1 -o filename2 -n
> >>
> >> Is there a definition of these files, and if so where?
> >>
> >> I think I can just use the component list at the end, so I need to skip
> >> the '.Def's, but they are confusing, since sometimes the .Def:End starts
> >> in the first column and sometimes not, and sometimes the .Def paragraphs
> >> are nested. Are they supposed to be that way?
> >>
> >> .Def*:*Z_Diodes_1N756 _net0 _net1
> >>        Diode:D1 _net0 _net1 Is="1E-11" N="1.27" Rs="3.858"
> >> Cj0="2.749E-10" Vj="0.75" M="0.33" Fc="0.5" Tt="5E-8" Bv="8.123"
> >> Ibv="0.01" Af="1" Kf="0"
> >> .Def:End
> >>
> >> .Def:PVR100AZ_B12V_mod _net4 _net1 _net2 _net3 _ref
> >> Sub:X1 _ref _net1 _net2 _net3 _net4 Type="PVR100AZ_B12V"
> >> .Def:PVR100AZ_B12V _ref _net1 _net2 _net3 _net4
> >> BJT:Q1 _net1 _net4 _net3 _ref Type="npn" Is="9.198e-014" Nf="1.003"
> >> Ise="4.468e-016" Ne="1.65" Bf="338.8" Ikf="0.4913" Vaf="107.9"
> >> Nr="1.002" Isc="5.109e-015" Nc="1.071" Br="29.48" Ikr="0.193" Var="25"
> >> Rb="1" Irb="1000" Rbm="1" Re="0.2126" Rc="0.143" Xtb="0" Eg="1.11"
> >> Xti="3" Cje="3.825e-011" Vje="0.7004" Mje="0.364" Tf="5.229e-010"
> >> Xtf="219.7" Vtf="3.502" Itf="7.257" Ptf="0" Cjc="1.27e-011" Vjc="0.4431"
> >> Mjc="0.3983" Xcjc="0.4555" Tr="7e-011" Cjs="0" Vjs="0.75" Mjs="0.333"
> >> Fc="0.905"
> >> Diode:D1 _net1 _net2 Is="9.794e-015" N="1.101" Bv="13" Ibv="0.005"
> >> Rs="0.3363" Cj0="4.377e-011" Vj="0.5656" M="0.3289" Fc="0.5"
> >> .Def:End
> >> .Def:End
> >>
> >> Qucs-devel mailing list
> >> Quc...@li...
> >> https://lists.sourceforge.net/lists/listinfo/qucs-devel
> >
> 
> 
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