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What type of filter produces a predictable phase shift characteristic in all frequencies?(a) Band pass filters(b) High pass filters(c) Low pass filters(d) All pass filtersI have been asked this question by my college director while I was bunking the class.The question is from Filters topic in chapter Fundamentals of Electronics of Avionics

Answer»

Right OPTION is (d) All pass filters

Explanation: An all pass FILTER passes all frequencies equally well over its design range but has a FIXED or PREDICTABLE phase shift characteristic. Filters normally attenuate the SIGNAL applied for some values of frequency whereas an all pass filter retains the signal level at all frequencies.



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