Cutoff frequency equation3/11/2024 On the other hand, if we use an active component (op-amp, voltage source, current source) while designing a circuit then the filter is called an active filter. If the design of the filter is completely based on passive components (like resistor, capacitor & inductor) then the filter is called passive filter. The filters are also divided based on the components used while designing the filters. So we have to use analog filters while processing analog signals and use digital filters while processing digital signals. We have to use corresponding filters for analog and digital signals for getting the desired result. We know signals generated by the environment are analog in nature while the signals processed in digital circuits are digital in nature. And we have covered many filters in previous tutorials, but most popular differentiation is based on, So the filter is used for allowing signals of chosen frequency pass through it or eliminate signals of chosen frequency passing through it.Īt present, there are many types of filters available and they are differentiated in many ways. It is used for choosing or eliminating signals of selected frequency in a complete spectrum of a given input. Electric filters have many applications and are extensively used in many signal processing circuits.
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