differentiator8_288K.m

%    6th order differentiator generator for FM demodulation
%    Copyright (C) 2024  Patrik Kluba <kpajko79@gmail.com>
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function [Hd, name, Fs, pbf] = differentiator8_288K

Fs = 288000;
pbf = 58650;

N = 8;
F = [0 pbf pbf+0.0001 Fs/2];
A = [0 pbf*2*pi/Fs 0 0];
W = [1 0.0001];

b  = firpm(N, F/(Fs/2), A, W, 'differentiator');
b  = b / 1.000087700773018673;
Hd = dfilt.dffir(b);

name = sprintf("%dth order differentiator for %.3f Ksps", N, Fs/1000);

% [EOF]