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Text File  |  1997-06-29  |  2KB  |  59 lines
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  6. <meta name="Author" content="Joakim Ögren">
  7. <meta name="Description"
  8. content="Formulas for a 1st order Butterworth active lowpass filter.">
  9.  
  10. <title>HwB: Active Filter: Butterworth 6dB Lowpass</title>
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  12. content="HwB, pinout, hardware, butterworth, filter, active, lowpass, 1st, 6">
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  29.  
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  31. <h1>Active Filter: Butterworth<br>
  32. (1st order, 6 dB/octave, Lowpass)</h1>
  33.  
  34. <p><img src="images/misc_ActiveFilter1L.GIF"
  35. alt="1st order Butterworth Lowpass" width="191" height="111"></p>
  36.  
  37. <p>R=4.7k-10 kOhm<br>
  38. C=1.000/(2*pi*Fc*R)</p>
  39.  
  40. <p><font size="2"><i>Units: R [Ohm], C [F], Fc [Hz]</i></font></p>
  41.  
  42. <address>
  43.     <font size="2">Contributor: </font><a
  44.     href="mailto:qtech@mailhost.net"><font size="2">Joakim Ögren</font></a>
  45. </address>
  46.  
  47. <address>
  48.     <font size="2">Source: ?</font>
  49. </address>
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  52. <address>
  53.     <font size="1">Please send any comments to </font><a
  54.     href="mailto:qtech@mailhost.net"><font size="1">Joakim Ögren</font></a><font
  55.     size="1">.</font>
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