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jpcima/ActiveFilter1.m

Created July 4, 2021 14:06
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ActiveFilter1.m
param1 = 0.5; % knob 0 to 1
Fs = 44100.0;
R1 = 330e3;
C1 = 220e-12;
R2 = 3.3e3;
C2 = 10e-9;
Rp = 100e3 * param1;
Num = [(R1*C1*(Rp+R2)*C2) (C2*(Rp+R2)+R1*C1+R1*C2) 1.0];
Den = [(R1*C1*(Rp+R2)*C2) (C2*(Rp+R2)+R1*C1) 1.0];
[H,W] = freqs(Num, Den);
Freq = W/(2*pi);
Mag = 20*log10(abs(H));
semilogx(Freq, Mag);
grid on;
grid minor;
%[z,p,k] = tf2zp(Num, Den);
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