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Higher order RC filter phase shift.

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Karolina_1

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hi

i wanted to calculate the phase shift of higher order RC low pass filter. How can i calculate it. Thank you.
 

You can calculate it just the way you calculate the phase response of any arbitrary transfer function (put j*omega instead of the s from Laplace transform, and calculate the phase). I think the only thing that you can expect ( in general and without calculation ) from the phase response of a low-pass filter is that well below the first pole (and zero) of the system, you have zero phase shift.

In order not to get involved with the tedious calculations, you can also use a simulator ( e.g. MATLAB or a circuit simulator like Hspice ) to find the phase response.
 

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