EE 230 Exam 2 Spring 2010

EE 230 Exam 2 Spring 2010 - EE 230 Exam 2 Spring 2010 NAME...

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Page 1 of 7 EE 230 NAME ______________________ Exam 2 Spring 2010 Instructions: There are 8 short questions and 5 problems. The points allocated to each of the questions are as indicated. The problems are all equally weighted with an assigned weight of 16 points each. All work should be included on the exam itself. Attach additional sheets only if you run out of space on a problem. Students may bring 2 pages of notes to the exam. Calculators are permitted but can not be shared. Questions: 1. (2pts) What is a typical value for the input bias current for an operational amplifier with FET inputs? 2. (2pts) Why are the poles of a sinusoidal oscillator typically placed slightly in the right half plane? 3. (2pts) What model for the op amp was needed to show that if the op amp input terminals of the basic noninverting amplifier are interchanged, that resultant circuit does not behave as an amplifier? 4. (4 pts) If an op amp is modeled by the expression () GB As= s+p ± and if the GB of the op amp is 2MHz and the pole is located at 10 rad/sec, by how many dB does the gain drop as the frequency is increased from dc up to 10KHz?
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EE 230 Exam 2 Spring 2010 - EE 230 Exam 2 Spring 2010 NAME...

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