회로이론 - Thévenin’s & Norton’s Theorems

i = io + isc
io: the current due to vo
isc: short-circuit current due to all sources in circuit A

RTh = circuit A회로 내부 등가저항

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Thévenin equivalent circuit

Norton equivalent circuit

1. only circuit indep
등가저항 Rth (전압원, 전류원 제거 후 계산) , Voc, Isc 계산

2. indep & dep
Voc, Isc 계산 후 Rth 계산

3. dep
Test voltage 나 전류를 걸어줌

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ex 1) Find Vo

ex 2) Find Vo

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Source Transformation