Using cascading, design an active low pass filter with the following specifications: Amax = 1 dB Amin = 30 dB fp = 20 kHz fs = 40 kHz The filter order N should be as small as possible. Choose only from the filter that you have studied. Draw your circuit and show all calculations for the component values, with justifications explained (where applicable)

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Filter

A filter is a device or process which removes some of the unwanted features or components like frequencies from a signal in signal processing. The feature of filters is the complete or partial suppression of some part of the signal, and filtering is a class of signal processing. This most often means removing some frequency bands or some frequencies. In the frequency domain, the filters do not exclusively act, especially in the image processing field many other targets for filtering exist. Without having to act in the frequency domain, the correlations can be removed for certain frequency components and not for others. The filters are widely used in electronics and telecommunication, in television, radio, radar, audio recording, music synthesis, control systems, computer graphics, and image processing.