Video looking at a Butterworth doubly terminated two pole BPF.
Note, the -3 dB freqs should be 3 dB down from the passband. As the passband is at approx. 1.2 dB down, another 3 dB would make -4 dB from the top of the screen. That would make the bandwidth around 3550 kHz to 3950 kHz.
24 авг 2024