22 Thevenin & Norton Circuits - ECE 110 M.-C. Brunet...

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ECE 110 M.-C. Brunet Thévenin & Norton Equivalent Circuits Handout 22
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ECE 110 M.-C. Brunet Thévenin & Norton Equivalent Circuits Handout 22 Thévenin & Norton Circuits Are simple forms of linear circuits with ideal sources and resistances. + _ V TH R TH is called a Thévenin circuit called a orton ircuit I N R N is called a Norton circuit Related important topics : characteristics IV characteristics Equivalent circuits Circuits are said to be equivalent if they have the same IV characteristic. Note : Thévenin & Norton circuits have linear IV characteristics…. M.-C. BRUNET ECE 110 UIUC 22.1
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ECE 110 M.-C. Brunet Thévenin & Norton Equivalent Circuits Handout 22 Example 1 : Give the IV equations for the circuits I I (a) (b) 2 Ω V + _ 5 Ω V + _ I = I = (c) I 10 Ω V + 10 Ω 2 Ω _ I = Comments? (d) I 10 Ω V + _ 10 Ω 2 Ω M.-C. BRUNET ECE 110 UIUC 22.2 I =
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ECE 110 M.-C. Brunet Thévenin & Norton Equivalent Circuits Handout 22 Example 2 : Give the IV equation and draw the IV graph for the following circuits (a) I 20V V + _ + _ I = = = D I x V + For V = 0 I = . . . . (this is a short-circuit connection) I For I = 0 V = . . . . (this is an open-circuit connection) V M.-C. BRUNET ECE 110 UIUC 22.3 Example 2: (continued) (b) I 30V V + _ + _ = = I = = D I = x V + Comments? M.-C. BRUNET ECE 110 UIUC 22.4
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ECE 110 M.-C. Brunet Thévenin & Norton Equivalent Circuits Handout 22 A typical question A linear circuit is given I V + _ C I = function (V) (linear!) Find the equivalent Thévenin (or Norton) circuit I ? V + _ + _ ? e.g.: It must have the same IV as the given circuit. ( V TH = ?, R TH = ?) M.-C. BRUNET ECE 110 UIUC 22.5 Example 3 : Find the equivalent Thévenin circuit for the following circuit.
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This note was uploaded on 09/16/2009 for the course ECE 110 taught by Professor Haken during the Spring '08 term at University of Illinois at Urbana–Champaign.

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22 Thevenin & Norton Circuits - ECE 110 M.-C. Brunet...

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