What is Norton resistance?

Nortons theorem is an analytical method used to change a complex circuit into a simple equivalent circuit consisting of a single resistance in parallel with a current source. Norton on the other hand reduces his circuit down to a single resistance in parallel with a constant current source.

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How do you calculate Norton current in a circuit?

In this example, the Norton current is obtained from the open circuit voltage (the Thevenin voltage) divided by the resistance r. This resistance is the same as the Thevenin resistance, the resistance looking back from AB with V1 replaced by a short circuit.

Why the voltage source is replaced by short circuit to get deactivate?

This is because they are replaced with their equivalent impedances. For an ideal voltage source, the equivalent impedance is zero and for an ideal current source, the equivalent impedance is infinite which interprets short circuit and open circuit respectively.

Can we use Norton theorem on a circuit containing a BJT?

Can we use Norton’s theorem on a circuit containing a BJT? Solution: We can use Norton’s theorem only for linear networks. BJT is a non-linear network hence we cannot apply Norton’s theorem for it.

What is the Norton equivalent source?

Norton equivalent circuit consists of an equivalent impedance connected parallel with a current source and load resistance. The constant current source used in Norton equivalent circuit is known as Norton current IN or short circuit current ISC.

What are the limitations of Norton’s Theorem?

Limitations of Norton’s Theorem It’s not for such modules which are not linear like diodes, the transistor. It also not operate for such circuitries which has magnetic locking. It also not work for such circuitries which has loaded in parallel with dependent supplies.

How do you find Norton resistance in a circuit?

Find the Norton resistance by removing all power sources in the original circuit (voltage sources shorted and current sources open) and calculating total resistance between the open connection points. Draw the Norton equivalent circuit, with the Norton current source in parallel with the Norton resistance.

What is the constant current source used in Norton equivalent circuit?

The constant current source used in Norton equivalent circuit is known as Norton current I N or short circuit current I SC. Norton theorem was derived by Hans Ferdinand Mayer and Edward Lawry Norton in 1926. As shown in the Norton equivalent circuit, the Norton current is divided into two paths.

What is Norton resistance in power electronics?

Norton Resistance. Norton equivalent resistance is the resistance measured through the output terminal after all internal voltage and current source are replaced by their internal resistance. For ideal voltage sources, they are replaced with a short and for ideal current sources, they are replaced with an open.