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mi_activefilterbutterworth1l.h
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<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<meta name="Author" content="Joakim Ögren">
<meta name="Description"
content="Formulas for a 1st order Butterworth active lowpass filter.">
<title>HwB: Active Filter: Butterworth 6dB Lowpass</title>
<meta name="Keywords"
content="HwB, pinout, hardware, butterworth, filter, active, lowpass, 1st, 6">
</head>
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background="images/bgr_grey.jpg" bgcolor="#C0C0C0" text="#000000"
link="#0000EE" vlink="#551A8B" alink="#FF0000">
<p align="center"><a href="menu_Misc.html"><img
src="images/mini_Back.GIF" alt="GoTo Misc" border="0" width="64"
height="48"></a><img src="images/menu_Misc.GIF" alt="MISC"
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<h1>Active Filter: Butterworth<br>
(1st order, 6 dB/octave, Lowpass)</h1>
<p><img src="images/misc_ActiveFilter1L.GIF"
alt="1st order Butterworth Lowpass" width="191" height="111"></p>
<p>R=4.7k-10 kOhm<br>
C=1.000/(2*pi*Fc*R)</p>
<p><font size="2"><i>Units: R [Ohm], C [F], Fc [Hz]</i></font></p>
<address>
<font size="2">Contributor: </font><a
href="mailto:qtech@mailhost.net"><font size="2">Joakim Ögren</font></a>
</address>
<address>
<font size="2">Source: ?</font>
</address>
<address>
<font size="1">Please send any comments to </font><a
href="mailto:qtech@mailhost.net"><font size="1">Joakim Ögren</font></a><font
size="1">.</font>
</address>
</body>
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