Report - ii- DRB at 10Ω Vin=10.0V (peak-to-peak)...

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Unformatted text preview: ii- DRB at 10Ω Vin=10.0V (peak-to-peak) Frequency (Hz) fres– 7.0 kHz fres– 5.0 kHz fres– 3.5 kHz fres– 2.5 kHz fres– 2.0 kHz fres– 1.5kHz fres– 1.2 kHz fres–0.9 kHz fres–0.6 kHz fres –0.4 kHz fres - 0.2 kHz fres fres + 0.2 kHz fres + 0.4 kHz fres + 0.6kHz fres+ 0.9 kHz fres+ 1.2 kHz fres+ 1.5 kHz fres+ 2.0 kHz fres+ 2.5 kHz fres+ 3.5 kHz fres+ 5.0kHz fres+ 7.0 kHz Frequency (Hz) 2.839 4.835 6.347 7.324 7.840 8.345 8.645 8.933 9.248 9.435 9.644 9.848 10.046 10.235 10.440 10.737 11.038 11.332 11.840 12.342 13.341 14.833 16 Vout (V) 0.02 0.042 0.072 0.11 0.14 0.19 0.24 0.3 0.40 0.56 0.8 0.9 0.8 0.6 0.48 0.36 0.28 0.22 0.18 0.14 0.1 0.08 0.06 Plot the graph of Vout versus frequency. From the graph, find the frequncies f+ and f - at which Vout becomes 0.707 of its resonance value. 0.707*Vres = 0.707*0.9 = 0.6363 f+ 10.046 f- 9.435 Qmeasured Calculate Q, using equation 3 in the manual. RL = 106.49 Ω . R= RL + 10 = 116.49 Ω Qcalculated = Calculating Then How do the measured and calculated values of Q compare? Questions and Analysis Compare the two Vout versus frequency graphs and comment Phase measurements using lissajoux figures: DRB at 300 Ω : A- Find the phase angle between Vin and Vout by measuring A and D for the following frequencies and calculate the phase difference using the measured values of L and C: Frequency (Hz) fres -4 KHz fres - 1 KHz fres fres +1 KHz fres +4 KHz D 3 2.5 0.4 2.2 3 A 3 3 2.8 3 3 Φ = sin-1(D/A) 90 º 56.4 º 8.2 º 47.17 º 90 º (calculated from (1)) 90 º 90 º How do the measure and calculated phase differences compare? • fres +1 KHz f = 10.725 kHz = = 53 º The calculated and measured value are close with and error of approximately 12% which means that are results are accurate • fres +1 KHz f = 13.752 kHz = = 79 º The calculated value and the measured value are very close with an error of approximately 12% showing that our results are accurate ...
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This note was uploaded on 01/06/2012 for the course PHYS 205L taught by Professor Antar,ghassan during the Spring '11 term at American University of Beirut.

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Report - ii- DRB at 10Ω Vin=10.0V (peak-to-peak)...

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