Re: [Qucs-help] Crystal problem

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

Am Mi, 3.10.2007, 19:51, schrieb Andreas Beranek:

> Hi all,

Hello Andreas,

> i recently was successful in finding qucs when i searched for a simulation
> tool.
> Congratulations to the authors. It is a very good and interesting
> software.
>
> Unfortunately i encountered a problem.
>
> I tried to simulate a crystal controlled Colpitts Oscillator.
> As i read in the lists that a crystal is currently not supported i
> designed
> my own very simple crystal replacement.
> I used serial R-L-C paralleled with a C.
>
> If i put the components and the equations directly into my schematic it
> works as expected. The simulation is excellent.
>
> If i create an a crystal device and try to create an user library the
> build
> shows following messages:
>
> FEHLER: Die Komponente "Ls" besitzt kein digitales Modell.
> Die Bibliothek wurde erfolgreich erzeugt.
>
> ERROR: The component "Ls" has no digital model
> The Library was created successfully.

The warnings are ok...  since there is a analogue model, which you are
going to use.

> When i use the component in my design the simulator crashes.

That is because you had an useless "Quarz" property with a default
value of "Quarz" in the subcircuit.  I made a fix in CVS which
catches this appropriately.

> What do i wrong?

Also the subcircuit contained a "6" for Cpar, which is wrong I guess;
did you mean "6e-12"???

Also I fixed a bug in the simulator which occurs when a component
property is specified by a equation variable which is just an
intermediate real value....  It is in CVS now.

Cheers, Stefan.