The basic content of Thevenin theorem and the solution method of equivalent voltage source and resistance are briefly described.

Introduction: Thevenin is equivalent to a two-terminal network with a voltage source and a resistor in series.

Calculation method of equivalent resistance: set all voltage sources and current sources in the two-terminal network to zero (voltage source zero is equivalent to a wire, current source zero is equivalent to an open circuit), then connect an independent voltage source (voltage v is self-determined and direction is self-determined) outside the two-terminal network, and then equivalent R=V/I(I is the current flowing through the independent voltage source).

Equivalent voltage method, directly finding the voltage of the network ports at both ends is equivalent voltage.

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Undergraduate students from electronic information engineering of Chongqing University.