High Pass Butterworth Filter
To derive the transfer function of a high pass Butterworth
filter, first derive the transfer function of a corresponding
low pass filter and then replace s in the transfer function
In the above applet s is replaced by 1/s in the normalised low
pass Butterworth response. The result is a normalised high pass
response. Magnitude response is shown in red and pink. phase
delay in green and group delay in cyan.
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COPYRIGHT © 2005 Cuthbert Nyack.