final_exam_f06 - Name _________________ ECSE 2050 Analog...

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Unformatted text preview: Name _________________ ECSE 2050 Analog Electronics Fall 2006 Final Exam Print your name on every page, show all work to ensure partial credit. You must do problems 1, 2, 3, 4 Problem 1 ( 15 points) _____ Problem 2 (10 points) _____ Problem 3 (10 points) _____ Problem 4 (20 points) _____ Solve 3 out of the next 5 problems . Clearly indicate which problems you do not want graded by crossing out the numbers below. Problem 5 (15 points) _____ Problem 6 (15 points) _____ Problem 7 (15 points) _____ Problem 8 (15 points) _____ Problem 9 (15 points) _____ Total _____ Include units in answers where appropriate, or else points will be deducted. 1 Problem 1 (15 points) Name:_______________ The figure below shows a circuit for a digital to analog converter (DAC). The circuit accepts a 4-bit input binary word (a 3 a 2 a 1 a ), where a 3 ,a 2 ,a 1 ,a take the value of 0 or 1 (+5V), to provide an analog output V (a) Assume an ideal opamp, show that the output voltage V is given by [ ] 3 3 2 2 1 1 2 2 2 2 16 a a a a R V F o + + +- = Where R F is in K R F 10K 20K 40K 80K V re f= 5V V o a 3 a 2 a 1 a 2 (b) Find the value of R F such that V ranges from 0 to -12 volts....
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final_exam_f06 - Name _________________ ECSE 2050 Analog...

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