Can anyone calculate the cut-off frequency and tell me which formula to be used on the Positive end of OPAMP?
what is the role of R1 here and R7 from the feedback? Please answer in details with resistance calculation, so that I can understand.
I suppose... Fc = 1 / [ ((R5||R1)||R7)+R2 ] * C1 x 2 * Pi
But I am not sure if pull-down resistor (r1) is either pull down here or not... and whether I shud use it for cut off calculation or not?
The AC analysis looks like that of bandpass filter... and can be seen here.. Cutoff finding would be helpful