readmeda.txt

AFD - Advanced Filter Design using MATLABMiroslav D. Lutovac, Dejan V. Tosicversion 1.00 released 15

AFD  - Advanced Filter Design
DAFR - Drawing Analog Filter Realizations -- version 1.00 for MATLAB
Miroslav D. Lutovac, Dejan V. Tosic -- This program is freeware.
 
"Drawing Analog Filter Realizations" (DAFR) is 
a MATLAB toolbox for creating schematics of analog filters.
By mouse point-and-click you draw analog filters in
MATLAB figure windows. The filter schematic is saved as an M-file,
and can be called as a stand alone function. You can use this
function in your own MATLAB code to illustrate or document
the filter realization that you work on. Alternatively, with DAFR
You can produce publication quality filter schematics;
the diagrams can be imported into your word processor as
EPS, WMF, or BMP figures. DAFR is easy to use, intuitive, and it is
based on standard built-in MATLAB commands.
 
INSTALLATION: DAFR is distributed in compressed form as the file
drawafil.zip, Create a directory, say drawafil, and decompress
drawafil.zip into it. Run MATLAB and execute the drawafil.m file.
 
DRAWING: After invoking drawafil.m the DAFR main window appears,
and you can draw an analog filter realization.
An analog filter realization is a network of interconnected
resistors, capacitors, inductors, impedances, and ....
Press the R, C, L, Z, or ... button to draw these elements. 
The element nodes are specified by mouse click, 
and are snapped to the grid.
The element is centered between the selected nodes.
For example, if you want to draw a resistor, press the
R button, point and click where the first node should
appear, and point and click where the second node should appear;
the resistor appears centered between the two nodes.
NOTE. You can draw only horizontal or vertical elements.
LINE, _|, |_ buttons draw line segments which connect nodes.
IN and OUT buttons draw small circles that
serve to identify filter input and output, respectively.
NODE button puts a dot that designates a node.
DELETE button scans all schematic items and you can mark
components that should be deleted. Press redraw to see the effect.
TEXT button adds text label to the schematic.
Save your schematic with the SAVE button, load it
by pressing the LOAD button, or view it with the VIEW button.
VIEW displays a filter without grid.
SAVE, LOAD and VIEW operate on a file named auxfilt.m,
which can be converted to eps format with the EPS button.
Various realization parameters can be edited by EDIT button.
Switch to the MATLAB command window to accomplish editing.
After you finish drawing, press SAVE to save the schematic.
The schematic will reside in auxfilt.m file, which you have
to rename if you want to keep it.
Issue the help command to see how to call auxfilt.m as a
MATLAB function, i.e. type "help auxfilt" in the command window.
The example buttons show various filter schematics and
the process of creating a more complex filter from simpler sections.
 
See also:  Miroslav D. Lutovac, Dejan V. Tosic, and Brian L. Evans
"Advanced Filter Design for Signal Processing Using MATLAB & Mathematica"
http://galeb.etf.bg.ac.yu/~lutovac or  http://telekom.etf.bg.ac.yu/~tosic
 
To gain access to updates of this free-of-charge software
you should be added to our AFD e-mail list, so contact us at
 [e-mail]   or   [e-mail]
We welcome your feedback -- your suggestions are appreciated.
 
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