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Unformatted text preview: Lecture #5 OUTLINE • Thevenin and Norton Examples • Maximum Power Theorem Reading Chapter 4 Thévenin Equivalent Circuit • Any* linear 2terminal (1port) network of voltage sources, current sources, and linear resistors can be replaced by an equivalent circuit consisting of an independent voltage source in series with a resistor without affecting the operation of the rest of the circuit. network of sources and resistors ≡ – + V Th R Th R L i L + v L – a b R L i L + v L – a b Thévenin equivalent circuit “load” resistor Thévenin Equivalent Circuit • Any* linear 2terminal (1port) network of voltage sources, current sources, and linear resistors can be replaced by an equivalent circuit consisting of an independent voltage source in series with a resistor without affecting the operation of the rest of the circuit. network of sources and resistors ≡ – + V Th R Th R L i L + v L – a b R L i L + v L – a b Thévenin equivalent circuit “load” resistor • The Thévenin equivalent voltage is the open circuit voltage of the original circuit (without the load). . • The Thévenin equivalent resistance is the input resistance of the original circuit with all independent sources “killed”. = Th oc V v Norton equivalent circuit Norton Equivalent Circuit • Any* linear 2terminal (1port) network of voltage sources, current sources, and linear resistors can be replaced by an equivalent circuit consisting of an independent current source in parallel with a resistor without affecting the operation of the rest of the circuit. network of sources and resistors ≡ R L i L + v L – a b a R L i L + v L – i N b R N Finding I N and R N = R Th • The Norton equivalent current is the short circuit current of the original circuit (without the load)....
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 Spring '08
 Phillips
 Volt, iL, Thévenin's theorem, independent sources, equivalent circuit, vy, iL RL vL

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