Re: [Qucs-devel] Post Qucs 0.0.10 release.

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

Am So, 3.09.2006, 16:06, schrieb mike brinson:

> Hello Stefan

Hello Mike,

Thanks for the email.

> Now that Qucs 0.0.10 has been released I am trying to plan my future work
> on Qucs digital simulation and analogue modelling.  The last few months
> have seen Qucs progress at a very fast pace allowing the package to mature
> to such an extent  that it is now possible to use the software for real
> design work.  Much work still remains to be done in both digital
> simulation and analogue component modelling - both of these are where I
> feel I can contribute a useful input to the project.

Your contributions were of high value, excellent style and are really
appreciated!

> The following notes present a rough outline of the topics I propose to
> work on over the next few months.  I have also posted a copy of this note
> to the Qucs development site so that other Qucs developers/users can keep
> in contact with the developments I am proposing - I also hope that this
> will result in feedback from other Qucs users.
>
> 1. Digital simulation.
>
> The second update to the "getting started with digital simulation" gives
> an insite into the way digital simulation is developing with Qucs/FreeHDL.
>  One of the next logic steps forward is to develop libraries of digital
> components - this involves the use of VHDL packages, VHDL text files and
> libraries of digital component schematics (that are functional of course).
>  Recently I have tested VHDL packages using Qucs/FreeHDL and find that
> they  work ok.  The next stage is to start writing VHDL libraries of
> components which can then be included with future releases of Qucs/VHDL.
> At the moment individual digital component schematics are limited to
> connections of type bit.  In the longer term work needs to be done on
> improving the Qucs digital GUI to include both bit and std_logic bus
> structures - this however, is more in the domain of Gopala than mine.  I
> also propose to write a digital component specification booklet that
> presents the details of each component, this will be in
>  a similar format to the Measurements Expressions Reference Manual written
> by Gunther.
>
> 2. Analogue component modelling.
> Work on the new 555 timer model is now complete and I will start writing a
> tutorial article for posting to the Qucs site in the next few days.  A
> range of 555 models will also be made available at the time the article is
> published.  I also propose to update the Operational Amplifier tutorial to
> include models for power supply rejection effects in general purpose OP
> AMP models.  Longer term the analogue modelling effort needs extensions to
> Qucs that include subcircuit   parameter passing, component values defined
> by equations and non-linear controlled sources.  These I now are already
> on your to do list.  Once in place it will then be possible to develop
> general purpose models for a wide range of analogue components,
> significantly extending the types of circuit that Qucs can simulate.
>
> The ideas listed above will probably take most of my spare time over the
> next few months.
> Your comments, and indeed other comments from other developers and users,
> will be most welcome.


The proposals sound very promising.  Don't even know how to thank you for
your efforts!

Cheers, Stefan.