diego.fan
Member level 3
Suppose I don't know this is low-pass or high-pass filter in advance.
If I don't not use the Av formula with j inside(Because I really think it's complex) to calculate the pole or zero, is there some faster method to know whether this is a zero but not a pole?
In my opinion, C should connect to the gate and drain of the same Mos. It should be a miller capacitor. The fp=1/(2*pi*Rout*AvC). Rout=R1//R2， Av is the gain of op. I cannot get the formula of fp in this picture.
May I ask where I make a mistake?
Thank you!
If I don't not use the Av formula with j inside(Because I really think it's complex) to calculate the pole or zero, is there some faster method to know whether this is a zero but not a pole?
In my opinion, C should connect to the gate and drain of the same Mos. It should be a miller capacitor. The fp=1/(2*pi*Rout*AvC). Rout=R1//R2， Av is the gain of op. I cannot get the formula of fp in this picture.
May I ask where I make a mistake?
Thank you!
