worksheet thevenin's theorem.doc

# worksheet thevenin's theorem.doc

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Thevenin’s Theorem And Interface Circuit Design By Sandra Haidar Christophe El Houayek Presented to Mr. Nassif Daoud A worksheet for the Circuit Lab ELEN 303 Faculty of Engineering University of Balamand

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2-2-2016 1- Thevenin equivalent circuit For figure 1 R1 = 4.7 kΩ R2 = 10 kΩ R3 = 22 kΩ V1 = 5V V2 = 12 V a- Calculation of R TH The circuit contains only independent sources so we Short circuit the voltage sources and calculate the equivalent resistance seen from the load resistor (10 kΩ). R TH = 22 kΩ // 4.7 kΩ = 3.8726 kΩ V TH = Voc = V So we use nodal analysis to calculate the thevenin voltage (V-5)/4.7 + (V-12)/22=0 V= V TH =6.2321 V The circuit is then: -V TH + R TH I + 10 I = 0 I = 0.4492 Across the load resistor: Vout = 10 I = 4.4924V I = 0.4492 mA
b- Adjust the variable DC supply to output the calculated V TH c- Data table: d- If the load resistor is changed, it is easier to use the thevenin’s theorem to recalculate the output voltage because the V TH and R TH will not change and the thevenin circuit will be the same but instead of the

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• Winter '19
• Thévenin's theorem, rth, Vout, Circuit Lab, Interface Circuit Design

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