What should be the gain of an amplifier at 20 kHz if the half power frequencies are fL = 20 Hz and fH = 15 kHz along with mid band gain = 80?

What should be the gain of an amplifier at 20 kHz if the half power frequencies are fL = 20 Hz and fH = 15 kHz along with mid band gain = 80? Correct Answer 48.07

fL = 20 Hz fH = 15 kHz Av(mid) = 80 To determine: Voltage gain at 20 kHz Formula : Av = Av(mid) / √1 + (f/fH)2 To determine the voltage gain at 20 kHz, we recognize that, Av = Av(mid) / √1 + (f/fH)2 = 80 / √1 + (20 k/15k)2 = 48.07.
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