Thevenin and Norton Equivalent Circuits

Thévenin and Norton Equivalent Circuits

Purpose

Objective:
	To show where Thévenin and Norton equivalences may be used.
Steps:
	We are interested in the voltage across, or current through a load. The Thévenin and Norton theorems allow us to simplify the circuits.

	Thévenin equivalent circuit has a voltage source and series resistor replacing the complicated circuit.

	Norton equivalent circuit has a current source and parallel resistor replacing the complicated circuit.

	Equivalent circuits are useful when we need to repeatedly solve the same circuit...

	...or where there are many similar sub circuits.

	In the simple example a circuit with three identical complicated sub-circuits may be replaced by a very simple circuit.

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