Example for 4KHz bandpass filter
Q=2 G=1 F=4000 C=100nF
R1=Q/(G*C*F*2pi)= 750 ohm
R2=Q/(((2*Q^2)-G)*C*F*2pi)= 120 ohm
R3=(2*Q)/(C*F*2pi)= 1500 ohm
Blue = Signal Input
Green = Signal Amplifier Output with offset
Orange = Bandpass filter Output with offset
