I was working on a Smith Chart app way back in Rb 2.1.2, managing to
draw the chart before arcs were available in Rb.
It's unfinished, and a hack port from a Sinclair Spectrum/BBC program
my father and I wrote in the mid 80s.
As such the chart is fixed size, and the app is primarily for radio
propagation applications rather than integrated circuit analysis, but
it works sorta (bar one method where there's a maths error), although
there's no facility for printing or saving.
You can enter data in one of 5 ways, and apply one of 13 different
matching elements, but adding more than one is part of the unfinished
stuff to do. You can also choose the size of the VSWR circle. Plots
the points and displays the new calculated values.
The chart is pretty basic though. The methods are in a module rather
than a class, and there's not much documentation.
I sort of gave up on it a bit, as I really wanted to rewrite it to
put the chart in the background as a pdf, not possible at the time.
On 20 Jun 2006, at 03:01, Jim Wagner wrote:
Does anyone have a "Smith Chart" class they would be willing to
share? These charts contain both rectangular and circular (non-
concentric) coordinate systems used to show complex impedances and
reflected waves in electrical (radio frequency) transmission-line
systems.
Tony Spencer
St Rémy de Provence (13) France
http://tonyspencer.blogspot.com/
_______________________________________________
Unsubscribe or switch delivery mode:
<http://www.realsoftware.com/support/listmanager/>
Search the archives of this list here:
<http://support.realsoftware.com/listarchives/lists.html>
