# su10q09 - 1 + R 2 (b) What is the high-Frequency gain? 1 +...

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ECE 3050 Analog Electronics Quiz 9 July 21, 2010 Professor Leach Name Instructions. No calculators allowed on this quiz. Print your name in the space above. Honor Code: I have neither given nor received help on this quiz. Initials 1. (a) What were the names of the two oscillator circuits covered in class? (b) An oscillator has a loop-gain transfer function given by K ( s/ 100) 2 - 3 ( s/ 100) + 1 ( s/ 100) 4 + 2 ( s/ 100) 3 + 2 ( s/ 100) 2 + 3 ( s/ 100) + 1 Determine the value of K for steady-state oscillations at the frequency ω = 100 rad / s . s = j 100 K ( s/ 100) 2 - 3 ( s/ 100) + 1 ( s/ 100) 4 + 2 ( s/ 100) 3 + 2 ( s/ 100) 2 + 3 ( s/ 100) + 1 = K - 1 - j 3 + 1 1 - j 2 - 2 + j 3 + 1 = - 3 K K = - 1 3 next page 1

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2. The fgure shows a non-inverting amplifer. (a) What is the low-Frequency gain? 1 + R F R
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Unformatted text preview: 1 + R 2 (b) What is the high-Frequency gain? 1 + R F R 1 + R 2 b R 3 (c) Sketch the Bode magnitude plot and label the zero-slope gains. High-pass shelving Bode plot (d) Solve For the transFer Function For V o /V i . V f V i = R 1 + R 2 R 1 + R 2 + R F 1 + ( R 1 b R 2 + R 3 ) Cs 1 + [( R 1 + R F ) b R 2 + R 3 ] Cs V o V i = p V f V i P-1 = p 1 + R F R 1 + R 2 P 1 + [( R 1 + R F ) b R 2 + R 3 ] Cs 1 + ( R 1 b R 2 + R 3 ) Cs (e) Use the transFer Function to identiFy the pole and zero Frequencies For the Bode plot. Label them on the plot. z = 1 [( R 1 + R F ) b R 2 + R 3 ] C p = 1 1 + ( R 1 b R 2 + R 3 ) C 2...
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## This note was uploaded on 05/26/2011 for the course ECE 3050 taught by Professor Hollis during the Summer '08 term at Georgia Institute of Technology.

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su10q09 - 1 + R 2 (b) What is the high-Frequency gain? 1 +...

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