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README.htm
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README.htm
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<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
<TITLE>FilterPro (TM)</TITLE>
</HEAD>
<BODY LINK="#0000ff" VLINK="#800080">
<div align="center"><FONT FACE="Arial" SIZE=2>FilterPro (TM)<br>
BURR-BROWN FILTER DESIGN PROGRAMS<br><br>
(c) Copyright 1991, 2001 Burr-Brown Corporation, Texas Instruments, Inc.<br></div>
<br>
Contents of this text:<br>
<blockquote>Brief descriptions of two Burr-Brown filter design programs<br>
Supporting Literature<br>
Hardware Requirements<br>
Printer Output<br>
Printing Response Plots<br>
MacIntosh Computers<br>
New Version of FILTER42-- 1.1<br></blockquote>
BRIEF DESCRIPTIONS--<br>
This disk contains a DOS-compatible program to aid in active filter design and two graphics dump utilities. The programs are not Burr-Brown products, but application information intended to aid in using our components. They are easy to use, with helpful on-screen prompts. Just try them!
<blockquote>FILTER42 designs a wide variety of filters using Burr-Brown's UAF42 Universal Active Filter IC. This state-variable filter provides low-pass, high-pass and band-pass outputs. Notch filters can also be designed.
<br><br>
EGAHPRES and EGAFXRES are screen dump utilities that can print response plots on HP Laserjet and Epson printers, respectively. See "printing response plots."</blockquote>
SUPPORTING LITERATURE--<br>
Filter42 can be used without documentation. You will eventually need the Application Bulletin for circuit details. These are available free from Burr-Brown. You can request the printed bulletins by calling 1-800-548-6132 in the USA or by contacting your local Burr-Brown representative. Or, you can have the bulletins faxed directly to you (USA only) by calling our FaxLine at 1-800-548-6133 (use the special document numbers at the right).
<blockquote>
<table border=0 cellpadding=0 cellspacing=0>
<tr>
<td></td>
<td><FONT FACE="Arial" SIZE=2>Application</font></td>
<td><FONT FACE="Arial" SIZE=2>FaxLine</font></td>
</tr>
<tr>
<td> </td>
<td><FONT FACE="Arial" SIZE=2>Program #</font></td>
<td><FONT FACE="Arial" SIZE=2>Document #</font></td>
</tr>
<tr>
<td>----------------------</td>
<td>----------------------</td>
<td>----------------------</td>
</tr>
<tr>
<td><FONT FACE="Arial" SIZE=2>Filter42</font></td>
<td><FONT FACE="Arial" SIZE=2>AB-035</font></td>
<td><FONT FACE="Arial" SIZE=2>20036</font></td>
</tr>
</table></blockquote>
Note: Burr-Brown's 1994 Applications Handbook contains the bulletin on page 349.<br>
<blockquote>
Send written requests to:<br>
Applications Engineering<br>
Burr-Brown Corporation<br>
P.O. Box 11400<br>
Tucson, AZ 85734<br>
</blockquote>
<br>
HARDWARE NOTES<br>
These programs will run on virtually all PC-compatible computers. To<br>
display response plots, you need VGA (or EGA) graphics. If you do not<br>
have a graphics display, you can still use them, but you cannot display<br>
response plots.</P>
On some keyboards, the arrow keys will not work with Caps-lock and/or<br>
Num-lock; turn them off if the arrow keys don't work. Numbers should be<br>
typed on the main keyboard, not the numeric keypad.<br>
<br>
PRINTER OUTPUT<br>
Printer output (text only) for both programs works with any 80-column<br>
(or wider) printer. Printer output is directed to LPT1.<br>
<br>
PRINTING RESPONSE PLOTS<br>
There is no facility within the programs to print response plots. If<br>
you have a graphics screen-dump utility, try it. We have provided two<br>
simple screen-dump programs for your convenience. EGAHPRES is for HP<br>
Laserjet printers. EGAFXRES is for Epson-compatible printers. Both are<br>
memory-resident programs which work with EGA or VGA graphics displays.<br>
The appropriate program must be loaded prior to running the filter<br>
program by typing its file name. To print a graphics screen press<br>
<Shift-Print-screen> while the desired plot is displayed. If it works,<br>
consider it a bonus from Burr-Brown.<br>
<br>
MacIntosh COMPUTERS<br>
FilterPro programs are not available for the MacIntosh. A program<br>
called "SoftPC" from Insignia Solutions Inc emulates a PC in software.<br>
FILTER2 runs using this program, albeit very slow. To display response<br>
plots, you also need Insignia's EGA emulation program. The total cost<br>
of both programs runs hundreds of dollars. Perhaps you have other PC<br>
programs you would like to run on your MAC?<br>
<br>Various add-on hardware is available for MACs to allow running PC<br>
programs. These probably work, but have not been tested. The<br>
equivalent PC must have EGA, or VGA compatible graphics to display<br>
response plots.<br>
<br>
REVISION OF FILTER42 PROGRAM<br>
A previous version of FILTER42 (1.0) crashed on some computers. This<br>
has been corrected with version 1.1. There are no other functional<br>
changes in the program. Version 1.1 produces the same filter designs as<br>
version 1.0. Version 1.11 corrects some minor cosmetics in the program,<br>
only.<br></FONT></BODY>
</HTML>