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]
top of page
Forum: Forum
bottom of page
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).
The formula for the total bandwidth for a two-stage amplifier with the same bandwidth is a bit complicated.
Since it is two-stage above, if you put n = 2, you get 500k x 0.643 = 321.79kHz, so the answer is number 3.