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Universal Notch Filter

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Universal Notch Filter

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The universal notch filter can be used to filter out an undesired frequencies.

Gain K: The filter gain K determines the low frequency gain of the filter.
Frequency fz: The filter attenuates at the zero frequency fz in Hz. Lower and higher frequencies will pass the filter. A lead in the phase response will start at this zero frequency fz.
Frequency fp: The filter amplifies at the pole frequency fp in Hz. The phase lead will stop at this pole frequency fp.
Damping dz: The filter damping of the zero dz indicates how steep the magnitude response will be at the frequency fz. More damping will result in a less steep behavior.
Damping dp: The filter damping of the pole dp indicates how steep the magnitude response will be at the frequency fp. Again, more damping will result in a less steep behavior.

Transfer function of the filter:

EquationUniversalNotch