D14.15 It is required to design a low-pass filter having fp = 1 kHz, Amax = 1 dB, fs = 1.5 kHz, Amin = 50 dB. (a) Find the required order of a Chebyshev filter. What is the excess stopband attenuation obtained? (b) Repeat for a Butterworth filter.
(a) N = 8, 5 dB; (b) N = 16, 0.5 dB