Thévenin Equivalent Circuits Summary

Thévenin Equivalent Circuits Summary -...

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Thévenin Equivalent Circuit Summary EE 302 – Dr. McCann Basic Concept: Any linear DC circuit can be replaced by an equivalent circuit consisting of a voltage source in series with a resistor. This Thévenin Equivalent Circuit can then be used to determine the response of the original circuit for any load that might be attached to it. The circuit represented by the Thévenin Equivalent must be linear, but the load need not be. Open Circuit Voltage and Short Circuit Current Method: This method is applicable for any linear circuit that contains at least one independent voltage or current source . Since most circuits do contain one or more independent sources, this method is often applicable. Remove the load from the original circuit. Compute the open circuit voltage (+ reference at the top or left) using node voltage, mesh current or any other appropriate method. Compute the short circuit current (reference direction is from + to – with respect to the polarity of the open circuit voltage) using any appropriate method. It is often necessary to use KCL to obtain the short circuit current. Then,
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