Wide Band Pass Butterworth Filter.
A wide band pass response is obtained by having a low pass
and high pass filter in series. The low pass must have a higher
3dB frequency than the high pass.
Applet above shows a wide band Butterworth response. Magnitude
response is in red and pink. phase delay is in green and group
delay is in cyan.
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COPYRIGHT © 2005 Cuthbert Nyack.