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Unformatted text preview: “dead” = definition of R th ⇒ v = v oc + R th ⋅ i Hence the equivalence at terminal (A,B). 3 3. Norton’s theorem (1) Norton’s theorem = Thévenin’s theorem + source transformation (2) Parameters R th : same as before i sc : according to source transformation i sc = v oc R th sc: “shortcircuit” Note that if we shorted AB, then i sc is the current flowing through the AB branch – hence the name “shortcircuit” current. Useful relationship: v = v oc + i ⋅ R th i = v R th − i sc i sc R th 4 4. Examples (1) Find Thévenin and Norton equivalent circuits Step 1. Find R th first. Step 2. Find v oc . 5 Step 3. Thevenin equivalent is Step 4. Norton equivalent (using source transformation) 6 (2) Find Thévenin and Norton equivalent circuits for the circuit below. Step 1. Find v oc . Step 2. Find R th . 7 Step 3. Thevenin Equivalent Circuit Step 4. Norton Equivalent Circuit...
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 Spring '08
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 Volt, Thévenin's theorem, rth, equivalent resistance, Norton equivalent circuits

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