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Notch is a ________(a) High pass filter(b) Low pass filter(c) Band stop filter(d) Band pass filterThis question was posed to me in a national level competition.This intriguing question comes from Channel in chapter Elements of Communication System of Analog Communications

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Right ANSWER is (c) Band stop filter

To explain I WOULD say: NOTCH filter is a band stop filter that allows most frequencies to pass through it, except frequencies in a specific range. It is just OPPOSITE of a band-pass filter. High pass filter allows higher frequencies to pass while Low pass filter allows lower frequencies to pass through it.



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