When an amplifier circuit with a high-band cut-off frequency of 500 [khz] is cascaded in two stages, what is the total high-band cut-off frequency of about [khz]?
1) 120 [khz] 2) 240 [khz] 3) 320 [khz] 4) 500 [khz]
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Another interpretation.
If high-pass filters with the same high-pass cutoff frequency are cascaded to two stages, the high-pass cutoff frequency becomes the same as when connected to one stage.
So the answer is (4).