SchematicSolver
Miroslav D. Lutovac
Dejan V. Tosic
Mathematica® Application
| About SchematicSolver |
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SchematicSolver
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| About SchematicSolver |
AFD - Advanced Filter Design
DrawFilt Toolbox -- DRAWING FILTER REALIZATIONS in MATLAB
DrawFilt version 2.1, Copyright (c) 1999-2000 M. Lutovac and D. Tosic
This is free software.
DrawFilt is a MATLAB toolbox for creating schematics of filters.
By mouse point-and-click you draw 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
MATLAB scripts to illustrate or document the filter realization
that you work on. DrawFilt produces publication quality
filter schematics; the diagrams can be imported
into your word processor as EPS, WMF or BMP figures.
DrawFilt is easy to use, intuitive, and it is based on standard
built-in MATLAB commands. Albums of example filter schematics
accompany DrawFilt -- run afalbum.m and dfalbum.m scripts.
Run demodraw.m script for a quick tour about DrawFilt features.
INSTALLATION: DrawFilt is distributed in compressed form as the file
drawfilt.zip. Decompress drawfilt.zip with path names. You obtain
AFD\DrawFilt
AFD\DrawFilt\album
...
DrawFilt directory has to be appended to the MATLAB path.
RUNNING: Run MATLAB and execute the following main scripts:
(a) drawfilt.m -- Draw Digital and Analog Filter schematics
(b) drawdfil.m -- Draw Digital Filter schematics
(c) afalbum.m -- Album of Analog Filters
(d) dfalbum.m -- Album of Digital Filters
(e) demodraw.m -- DrawFilt demo
DRAWING: After invoking drawfilt.m the DrawFilt main window appears,
and you can draw a digital or analog filter realization.
A filter realization is a network of interconnected components:
delays, multipliers, adders, etc. (for digital filters), and
resistors, capacitors, amplifiers, etc. (for analog filters).
Click the R button to draw the resistor, click the Mult button
to draw the multiplier (gain), and so on.
Enter the position of element nodes by mouse click,
(nodes are automatically 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.
You can draw only horizontal or vertical elements.
LINE, _|, and |_ buttons draw line segments which connect nodes.
IN and OUT buttons draw small circles that
identify filter input and output, respectively.
NODE button puts a dot that designates a node.
TEXT button adds a text label to the schematic.
NEW button clears the schematic and you can start a new drawing.
OPEN/SAVE button opens/saves schematic from/to a file.
Realization parameters can be edited by the EDIT button.
DELETE button erases selected schematic objects,
UNDO undoes the last deletion.
MA button creates a Mathematica package for drawing
the current filter realization in a Mathematica notebook.
The name of the package is drawmath.m and it resides
in the current MATLAB directory. Run Mathematica and
open drawmaaf notebook to draw the schematic.
A group of buttons operates on a file named auxfilt.m,
and you can use them for quick save or open. In addition
the EPS button converts auxfilt.m to eps format.
The view button previews auxfilt.m without the grid and buttons.
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.
DrawFilt saves a filter schematic as a MATLAB function
which can be called in your MATLAB scripts. Feel free to
COMBINE the schematic with your scripts and plots.
Start dfalbum and click the button "draw +" to get an idea
how you can use a DrawFilt drawings in a MATLAB subplot.
Download DrawFilt software in MATLAB (zip compressed M-files):
| DrawFilt - Drawing Filters | drawfilt.zip | 247 K | Gallery of Analog Filter Realizations |
View or download related papers in pdf or zip compressed postscript:
| M.D.Lutovac,
D.V.Tosic |
"Digital filter design using
MATLAB and Mathematica" invited paper |
Proc.VI Conf. TELFOR'98,
Beograd, Yugoslavia, invited paper |
Nov.1998
pp.354-359 telf98lt.htm |
abstract
zip 74 k |
| D.V.Tosic,
M.D.Lutovac, B.L.Evans |
"Advanced digital filter design" | Proc. European Conf.
Circuit Theory Design ECCTD'99, Stresa, Italy |
Sep.1999,vol.2
pp.1323-1326 ecctd9tl.htm |
abstract
zip 51 k |
| D.V.Tosic,
M.D.Lutovac, B.L.Evans, I.M.Markoski |
"A tool for symbolic
analysis and design of analog active filters" |
5th Int. Workshop, Symbolic Methods,
Applications, Circuit Design, SMACD'98, Kaiserslautern, Germany |
Oct. 1998
pp. 71-74 smac98tl.htm |
abstract
zip 52 k |
| M.D.Lutovac,
D.V.Tosic, B.L.Evans |
"A MATLAB Toolbox for
analysis of continuous-time filters" |
22nd Int. Conf.
Microelectronics, Nis, Serbia |
May. 2000
pp.743-746 miel99lt.htm |
abstract
zip 42k |
| D.V. Tosic,
M.D.Lutovac, B.L.Evans |
"Advanced filter design" | Proc. IEEE Asilomar Conf.
Signal, Systems, Computer |
Nov. 1997
pp.710-715 asil97tl.htm |
abstract
pdf 141k |
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