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Basic Op-Amp Circuits

Q1: A two-pole high-pass active filter would have a roll-off rate of

A 40 dB/decade

B –40 dB/decade

C 20 dB/decade

D –20 dB/decade

ANS:B - –40 dB/decade

It should be +40db/decade since the slope of the curve for a high pass filter is increasing and not decreasing.

-40db/decade should be for a second-order (two-pole) low pass filter.



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