Question: A certain low-pass filter has the Bode diagram shown in Figure P12-8. (a) At what frequency is the filter (10 mathrm{~dB}) down? (b) Estimate where

A certain low-pass filter has the Bode diagram shown in Figure P12-8.
(a) At what frequency is the filter $10 \mathrm{~dB}$ down?
(b) Estimate where the cutoff frequency occurs, then determine how many $\mathrm{dB}$ down is the filter at two octaves after the cutoff frequency?

IT(jo) 10 0.1 0.01 | 1 | 1 10 100 1000 5000

IT(jo) 10 0.1 0.01 | 1 | 1 10 100 1000 5000 10,000 o (rad/s)

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