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The resonant frequency of m-derived low pass filter in terms of the cut-off frequency of low pass filter is?

The resonant frequency of m-derived low pass filter in terms of the cut-off frequency of low pass filter is? Correct Answer fc/√(1-m2)

If a sharp cut-off is desired, the frequency at infinity should be near to fc. The resonant frequency of m-derived low pass filter in terms of the cut-off frequency of low pass filter is fr=fc/√(1-m2).

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