Title :
The noise gain of a digital butterworth ladder filter
Author :
Bretherton, Chris ; Steinhardt, Allan
Author_Institution :
Massachusetts Institute of Technology, Cambridge, MA
fDate :
12/1/1983 12:00:00 AM
Abstract :
We show that any digital Butterworth ladder filter has a noise gain of N/2, where N is the filter order. The result is obtained by linking the noise gain to the average time delay of an analog Butterworth filter, which we show to be N/4E.
Keywords :
Band pass filters; Delay effects; Digital filters; Fourier transforms; Frequency response; Joining processes; Low pass filters; Nonlinear filters; Passband; Quantization;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
DOI :
10.1109/TASSP.1983.1164239
