Attached is the circuit section for the differential signal amplification. The circuit is comprising of common mode and differential mode filter capacitors.So there will be two different cut-off frequencies for different filters.
During my study on the same, i found that normally cut off frequency is considered with only differential filter capacitor(C2) and the expression for the same as fc=1/(2*pi()*(R2+R3)*C2.
My question here is why don't we consider C3 and C4 for the corner(Cut-off) frequency calculation. Could somebody explain on how we calculate the same here?