Re: [Qucs-help] Simulation timestep

[Mike K. <mi...@ta...>]

>
> > I must've tarred it up at the wrong time. Oops. The main.sch should have
> > start=0, stop=10ms, 5e6 points and less_points.sch should have start=0,
> > stop=10ms, 1e6 points. Under these conditions, main.sch has the expected
> > behavior (Vout goes to the 5v area and then decays to 0v). I just
> > confirmed
> > that my current simulations use these stop, start, and points.
>
> Ok, I check the schematics once again.
>
> In the attachment you find a modified version which is probably what
> you want.  I played with the initial conditions of the L/C's in the
> circuit.  Due to the large L/C values you have also large time constants.
> And on the other hand you have small time steps due to the current
> excitations.  This is the problem.


Very good!

Now I also see why you request a MaxStep property for the transient
> analysis.  In your case the built-in algorithm to determine a max. step
> somehow fails due to the above problem.  Locally I already implemented
> the property.  It's going into CVS as soon as possible and will be
> available in the next release.


I'll be watching for the next release!

I am still curious to understand how the time-step control handles a state
change in a relay (transition from closed->open or vise versa). In our
previous e-mails, you mentioned that the time-step control took it into
account, but I don't understand how it responds.

Cheers and thanks for your patience,
>

All the thanks should be to you, Stefan, for working on this great
simulator.

Mike