Norton Equivalent

Cuthbert Nyack
This states that any linear bilateral circuit can be replaced by a circuit consisting of a single current source in parallel with a single resistor.

The applet above shows a circuit(black) and its norton equivalent(red) If a resistor R is connected to either circuit at the terminals AB then the current through R and the voltage across it is always the same for both circuits. As far as behaviour at the terminals is concerned, the 2 circuits are equivalent.
For nonlinear circuits a linearised equivalent must be obtained about the operating point.
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COPYRIGHT © 1996 Cuthbert A. Nyack.