> > The attached patches allow the tabular diagram to show the magnitude in
> > decibels (relative to 1v) in addition to real/imaginary and
> > magnitude/angle views. This is useful for me since I'm working with
> > audio. It adds a new categories under the "Number Notation" called
> > "Magnitude (decibel)" in the "Edit Diagram Properties" dialog. The
> > patches are against the following files in in the 0.0.8 release
> > - /qucs/main.cpp
> > - /qucs/main.h
> > - /qucs/diagrams/tabdiagram.cpp
> > - /qucs/diagrams/diagramdialog.cpp
> Thanks a lot. The idea is good! I will have a look. Perhaps I
> will change it a little bit before inserting it into Qucs.
> > I'm about at my skill level right now, so this is about as good as I
> > can get. If I can figure it out (I don't see it happening any time
> > soon), I'd like get the following in there too:
> > - Get Cartesian graphs to do a dB scale
> Generally, you can use equations on the schematic to show
> dB scales. I will think about whether this is useful in the
> diagram itself...
Ahhh... Since I've only been using Qucs for a little bit, I hadn't
gotten there yet. That does work well, accomplishes the same goal, and
is more flexible. I'd probably go with the equations instead of the
> > - Ability to set the reference voltage in a separate box in the "Edit
> > Diagram Properties" dialog
> Do you really need an arbitrary reference voltage or do you mean
> dBV (reference 1V), dBuV (reference 1uV) etc. ?
My experience doing audio amplifiers is that you change your reference
depending on what full-scale is (i.e. blasting 100W into 8 ohm
requires around 40v, so you reference your output signal to 40v) and
everything is down from that reference. However, it's easy to correct
for the reference in the equations.
Thanks for working on Qucs,
mike -at- tashcorp.net