q11 - /V i . s 2 V o + 3 sV o + 4 V o = 8 V i = V o V i = 4...

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ECE 3050 Analog Electronics Quiz 11 April 1, 2009 Professor Leach Name Instructions. Print your name in the space above. Honor Code: I have neither given nor received help on this quiz. Initials 1o f2 . The f gure shows a three op amp instrumentation ampli f er. It is given that v I 1 =1 . 5V , v I 2 = 2V , R 1 =1k , R 2 =2k , R 3 =3k , R 4 =4k , R 5 =5k , R 6 =6k ,and R 7 =7k .S o l v ef o rth e node voltages v A through v F and the output voltage v O . v I1 1.5 v I2 2 R 1 1000 R 2 2000 R 3 3000 R 4 4000 R 5 5000 R 6 6000 R 7 7000 v A 1 R 3 R 1 v I1 . v I2 R 3 R 1 . v A 12 = v B v I1 v B 1.5 = v C v I1 R 2 R 1 . 1 R 2 R 1 v I2 . v C 9 = v E v A R 7 R 5 R 7 . v E 7 = v F v E v F 7 = v O v E 1 R 6 R 4 . v C R 6 R 4 . v O 31 = 2 of 2. (a) A circuit has the di f erential equation ¨ v O +3 ˙ v O +4
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Unformatted text preview: /V i . s 2 V o + 3 sV o + 4 V o = 8 V i = V o V i = 4 s 2 + 3 s + 4 = 1 ( s/ 2) 2 + (3 / 2) ( s/ 2) + 1 (b) Sketch and label the Bode magnitude and phase plots for the transfer function T ( s ) = K (1 + s/ ) (1 + s/r ) where r is a number such that r . Magnitude: Starts at K at zero frequency, breaks to 1 dec/dec at = , and breaks to 2 dec/dec at = r . Phase: Starts at , approaches 90 between and r , and approaches 180 well above r . 1...
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