A de-emphasis network has:
A) an upper cutoff frequency of 2.120 kHz.
B) a high-frequency roll-off rate of -20 db per decade.
C) a time constant of 75 microseconds.
D) all of the above

Question

Quizplus · Accepted Answer

A de-emphasis network, commonly used in FM broadcasting and other audio processing applications, indeed has characteristics that match all the provided options. It has an upper cutoff frequency around 2.120 kHz, a high-frequency roll-off rate of -20 dB per decade, and a time constant of 75 microseconds. These specifications are designed to complement the pre-emphasis applied at the transmitter, reducing noise and improving signal quality.

A De-Emphasis Network Has