Phase lag compensation can reduce the cut-off frequency of the system after compensation by means of_____ in the intermediate and high-frequency band of the original system, so as to obtain sufficient phase margin with the help of the phase at this frequency of the original system.
A: magnitude attenuation
B: phase lag
C: magnitude increase
D: magnitude unchanged
A: magnitude attenuation
B: phase lag
C: magnitude increase
D: magnitude unchanged
举一反三
- Two light sources are said to be coherent if they ( ) A: are of the same frequency. B: are of the same frequency and amplitude. C: are of the same amplitude, and maintain a constant phase difference. D: are of the same frequency, and maintain a constant phase difference.
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