Comparison of Butterworth and Bessel Responses.

Cuthbert Nyack
The Responses of Butterworth and Bessel Filters are compared in the applet below. The magnitude is shown by red, green, cyan and pink lines and the phase delay by orange and yellow lines.
The smoother phase delay of the Bessel response is accompanied by a reduced attenuation compared with the Butterworth response.

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COPYRIGHT 2005 Cuthbert Nyack.