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Norton Equivalent Circuit Theorem | ||||||
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Norton's theorem for electrical networks states that any collection of voltage sources, current sources, and resistors with two terminals is electrically equivalent to an ideal current source, I, in parallel with a single resistor, R. For single-frequency AC systems the theorem can also be applied to general impedances, not just resistors. The Norton equivalent is used to represent any network of linear sources and impedances, at a given frequency. The circuit consists of an ideal current source in parallel with an ideal impedance (or resistor for non-reactive circuits). - Wikipedia The Norton Equivalent of a circuit consists of a Norton current source in parallel with a Norton resistor and is valid for any load. In AC circuits a Norton equivalent circuit is valid for a single frequency. The Norton current is the short-circuit current at the output - the same as what is calculated for the Thévénin short-circuit current (see Thévénin Equivalent page). The Norton resistance is the same as the Thévénin resistance.
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