(2) suppose the open-loop amplifier (or simply the OpAmp) in the above feedback amplifier has the following simulated magnitude and phase response. Some of the data points are given below: f3 =175kHz, Mag(f;)=42dB, Phase(f,) =-180deg f, =120kHz, Mag(f;)= 48DB, Phase(f,)=-150deg fo =100kHz, Mag(f.)=51dB, Phase(f.) =-135deg fs = 85kHz, Mag(f;)=53dB, Phase(f;)=-115deg f =77kHz, Mag(f.)=55dB, Phase(f,) =-105 deg f3 = 45kHz, Mag(f;)=57&B,Phase(f;) =-75deg %3D %3D Phase (deg) 20 loglAl(dB) 70 60 -50 42 40 -100 -150 20 -180 -200 -250 (Hz) -270 10M S (H2) -10 Ik 10k 100k IM 10M Ik IM (a) Magnitude (b) Phase (without pole compensation), from the plots or the data given, calculate the required feedback coefficient B for a phase margin of 75 degrees.
(2) suppose the open-loop amplifier (or simply the OpAmp) in the above feedback amplifier has the following simulated magnitude and phase response. Some of the data points are given below: f3 =175kHz, Mag(f;)=42dB, Phase(f,) =-180deg f, =120kHz, Mag(f;)= 48DB, Phase(f,)=-150deg fo =100kHz, Mag(f.)=51dB, Phase(f.) =-135deg fs = 85kHz, Mag(f;)=53dB, Phase(f;)=-115deg f =77kHz, Mag(f.)=55dB, Phase(f,) =-105 deg f3 = 45kHz, Mag(f;)=57&B,Phase(f;) =-75deg %3D %3D Phase (deg) 20 loglAl(dB) 70 60 -50 42 40 -100 -150 20 -180 -200 -250 (Hz) -270 10M S (H2) -10 Ik 10k 100k IM 10M Ik IM (a) Magnitude (b) Phase (without pole compensation), from the plots or the data given, calculate the required feedback coefficient B for a phase margin of 75 degrees.
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.3P
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