Exam%202%20Solutions

Exam%202%20Solutions - Y4-EE338K Quiz 2 Dec 1,2009 NAME 1...

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Unformatted text preview: Y4-EE338K Quiz 2 Dec. 1,2009 NAME: 1. The Bode plot below shows laGro)1 and / a(jro) for an Op Amp that is internally compensated to be unity gain stable. If that Op Amp is used in the given feedback circuit find the Phase Margin. C=l,",F R=lkQ ~I11----+-----'\1\ Es6 (-) . + -r-------.....-a(s)(E" -E-) ..~.-.---~Op Amp Model 100 III 80ct .JJ 60.-U 40 O al 20 o ,....... 3 -20 44 a-40 -60 -80 I • I • ~ .~ I ~ I~ .~I~, ~ I'" ~ ..~ 1\ J\ I I I I I I I IRAD 10-2 10-1 1 101 102 103 104 105 1106 107 108I~\ISEC -1/ '1\I I I I I I I I I90 VI QJ ~ 0) -90 Q) o I -180 ~1-270--360 -450 o _. . I I I I \ \ I 1 \ \I ~I \ \ ,~ i \ \ I ~ !~ \ .~ 1\ 1\ ~ \ \ 1\ \ \ \ l~ \ \ '" \I" \ " 1 2JA. EE338K 2 Dec. 1 2009 2. The magnitude and phase of the uncompensated I-LGm)1 for the feedback circuit below are given in the accompanying plots. Determine the largest value of mc that will compensate the circuit for +900 Phase Margin and sketch the compensated I-LGm)1 and I-LCjm) curves....
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This note was uploaded on 02/08/2010 for the course EE 339 taught by Professor Banjeree during the Fall '08 term at University of Texas.

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Exam%202%20Solutions - Y4-EE338K Quiz 2 Dec 1,2009 NAME 1...

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