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if you are talking about the cutoff frequency i think that Cin doesn't enter the equation after simplifications the equation is f = 1/(2pi R2 C1) C1 will affect it not Cin. am i true?
Thank you for all your responses, i tried to work on the circuit that is without the Cin and gives me that on the oscilloscope but there is some distortion here don't know why, sorry for the quality of the image.
For the function of Cin i asked someone he told me that it blocks high frequencies...
hi all
i want to design a low pass filter but i have some questions i simulated it in pspice but there is a Capacitor named here Cin what is its function i try to to remove it and the circuit gives the same result.
another technical question why we don't use inductors in filters and if you have...
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