Re: [Qucs-help] Question about diagrams

[Stefan J. <st...@gr...>]

Am Sa, 19.05.2007, 15:56, schrieb George Kourkafas:

Hello George,

> Dear Qucs Team,congratulations for the developement of this amazing piece
> of software. The fact that such programs are under the GPL licence is very
> promising...

Thanks.

> I have a question I'd like to ask. Could you please tell me if
> there is a way to change the data item on the x-Axis in the diagrams? I am
> trying to depict the i-v curve of a diode under a dc Voltage source when a
> resistor is connected before the diode (in line). In other words, i want
> the diode's voltage (not the source's voltage) to be in the x axis and the
> current in the y-axis. I tried the PlotVs equation but i get a "wrong
> dependency" message in the table (the dependency remains on the source's
> voltage so the x-axis remains as it is).An idea to solve the problem could
> be replacing the voltage source with a current source (so the current,
> which is the same everywhere in the circiut, is the independent data) and
> then measuring the diode's voltage, but with  the axes being reversed, but
> i don't know if this is possible.Thank you in advance and
> congratulations,George KourkafasGreece.

Both things should be possible.  PlotVs() and the current sweep.  Can you
send in the schematic+data display, so I can have a look at it and probably
fix it for you...

Thanks for trying Qucs,
  Stefan.