Biquad filter: is one of the active filters which combine the low pass filter, high pass filter, and band pass filter in the same circuit.
it consist of three circuits in one circuit.
there are tow types of Biquad filter:
1- the ordinary biquad filter: which consist of three equations, one for low pass filter, and one for high pass filter, and the third for band pass pass filter.
2- the general form biquad filte:which consist of one equation but perform all the active filters mentioned above.
both with new k and new wo.
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