A filter is provided of order 3, find the roll-off rate.(a) 6 dB/decade(b) 60 dB/octave(c) 60 dB/decade(d) 3 dB/decadeThis question was posed to me in an online quiz.My question is from Frequency Filters in section Op-amps and its Applications of Analog Circuits

A filter is provided of order 3, find the roll-off rate.(a) 6 dB/decad

1.	A filter is provided of order 3, find the roll-off rate.(a) 6 dB/decade(b) 60 dB/octave(c) 60 dB/decade(d) 3 dB/decadeThis question was posed to me in an online quiz.My question is from Frequency Filters in section Op-amps and its Applications of Analog Circuits
Answer» The correct answer is (c) 60 dB/decade To explain: Roll-off rate is the rate at which the GAIN of a FILTER decreases outside the pass-band. Roll of rate is increased as the ORDER INCREASES. For an nth order filter, roll-off rate is 20xn dB/decade.

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