I have set Tow-Thomas filter to get bandpass output. I want center frequency to be precise as much as possible. If there occurse center frequency shift in the lab, what are possible way to compensate this shift?
If we take R2=R3=R=R4 and C1=C2=C,
Q = R1 / R , ω0 = 1/(RC) , H = -R1/R
where Q is quality factor, w0 is center angular frequency and H is center frequency gain.
I thought one possible compensation, to target a higher/lower frequency to get desired center frequency. But this is very cumbersome, since it requires to change at least 3 resistors.