Between the lower and upper critical frequencies of a band-pass filter:
A)the frequencies pass a maximum level.
B)the frequencies pass at 70% to their maximum levels.
C)the frequencies pass a minimum level.
D)the frequencies pass at 30% to their maximum levels.

Question

Quizplus · Accepted Answer

Between the lower and upper critical frequencies of a band-pass filter, the frequencies pass at 70% (or -3dB) to their maximum levels, which is a standard way to define the bandwidth of such filters.

Between the Lower and Upper Critical Frequencies of a Band-Pass