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lecture11 - Introduction Thevenins Theorem is a very...

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Thevenin’s Theorem Introduction • Thevenin’s Theorem is a very important and useful theorem. • It is a method for the reduction of a portion of a complex circuit into a simple one. • It reduces the need for repeated solutions of the same sets of equations. Thevenin Equivalent Circuit Any two-terminal linear network, composed of voltage sources, current sources, and resistors , can be replaced by an equivalent two-terminal network consisting of an independent voltage source in series with a resistor. Network of Sources and Resistors Arbitrary Network Arbitrary Network V Th R Th . . . . a a b b + v - + v - i i V-I Characteristic of Thevenin Equivalent V Th R Th . . a b + v - i v i V Th . . i sc v = V Th - R Th i 0
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Finding V Th and R Th Open circuit across terminals Calculate the open- circuit voltage in the original network, v oc Th oc , 0 v v v i = = = V Th R Th . . a b + - i v oc =V Th . . a
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This note was uploaded on 03/15/2009 for the course EE 112 taught by Professor All during the Spring '08 term at Cal Poly.

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lecture11 - Introduction Thevenins Theorem is a very...

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