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Unformatted text preview: is any dependent source in the circuit, then the test source method can be used to find the Thevenin resistance. Test source method: 1) 2) 3) Kill all the independent sources as before. Do not kill the dependent sources Connect a source (either voltage or current source) of known value across the two terminals. Do the circuit analysis to find the current (if test source is a voltage source) from it, or the voltage across it (if the test source is a current source). 4) Divide the voltage across the terminals by the current into the terminals to find the Thevenin’s resistance. Test source method may have some advantages over the short circuit current method, if the circuit has many sources. Example: Finding the Thevenin’s equivalent circuit for the circuit between AB, where it is connected to another circuit. 470 470 A 5V 470 C B To find the Thevenin equivalent: 49 EE1002 Introduction to Circuits and Systems Rt A vt C B Step1: To find the open‐circuit voltage between points AB. 470 5V C 470 A 470 voc B After opening the branch AB, there will be n...
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This document was uploaded on 01/20/2014.

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