Note the cutoff frequency
Because there is an extra f in the complex impedance in the previous derivation
The function here is:
Among them: f is the frequency of the input signal, and f_B is the cut-off frequency of the filter.
The phase angle φ of this function, (the arc cosine value of its argument):
Bring the function into have:
Re(H(f)) =
Im(H(f)) =
The phase angle φ is:
φ = =
