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Week 5 Test Solution

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Engineering
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Homework
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
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$6'@$$>
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Week 5 Test 1. Reference the textbook problem 5.4. Develop an ac bridge for Problem 5.3 Use 880 pF for all the bridge capacitors, and assume a 10-V rms, 10-kHz excitation. What is the maximum bridge offset voltage amplitude? Ans ?E =10*(C1/ (C1+C3)-C2/ (C2+C4)) We find off null voltage for C4 ranging from 863pF to 898pF, so for both cases ?E1 =10*(880/ (1760)-863/ (1743)) =-48.7mVRMS ?E2 =10*(880/ (1760)-898/ (1778)) =-50.6mVRMS 2. Reference the textbook problem 5.6. An LVDT with associated signal conditioning will be used to measure work-piece motion from -20 to +20 cm. The static transfer function is 2.5 mV/mm. The output will be interfaced to a computer via an ADC.? a. What is the range of output voltage?? b. If the desired re ...
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