| 4.5 Thevenin’s Theorem (1) |
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| It states that
a linear two-terminal |
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| circuit (Fig.
a) can be replaced by an |
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| equivalent
circuit (Fig. b) consisting |
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| of a voltage source VTH
in series with |
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| a
resistor RTH, |
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| where |
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| • | VTH is
the open-circuit voltage at the |
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| terminals. |
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| • | RTH is
the input or equivalent resistance at |
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| the terminals
when the independent |
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| sources are
turned off. |
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