Gain margin is equal to the_________________?
Correct answer: C. Reciprocal of amplitude ratio
- A. Amplitude ratio
- B. Gain in P controller
- C. Reciprocal of amplitude ratio
- D. Gain in P-I controller
Explanation
At the phase-crossover frequency, gain margin is the factor by which the loop gain can increase before reaching the stability limit. Thus it is the reciprocal of the amplitude ratio at that frequency.
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