Q.

For a stable closed loop system, the gain at phase crossover frequency should always be:

A. < 20 db
B. < 6 db
C. > 6 db
D. > 0 db
Answer» D. > 0 db
Explanation: phase crossover frequency is the frequency at which the gain of the system must be 1 and for a stable system the gain is decibels must be 0 db.
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