Hi everyone. Please clarify me the basic question related to filters.
As we know that the ideal magnitude response of low pass filter is shown in Fig below. It signifies that, it passes low frequencies and attenuates high frequencies. Similarly, please clarify me what is the significance of ideal phase response of low pass filter (order may be two or three) with Figure (ideal phase response of low pass filter)? Thank you.
The ideal phase response for the filter whose magnitude response is provided in the question will be almost same as the figure provided with a pass-band phase of 0o and stop-band phase of -90o.
Thank you @ Abdul Malik Khan for your response. But my intention of this question, the significance of phase response on the design of filters. Here, -90 degrees indicates what? And for high pass and band pass, what is it? What is the significance of these numbers (-90 degrees for first order, -180 degrees for second order) on the design of filters?
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