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Chapter 4 - Superposition

# Chapter 4 - Superposition - Superposition Chapter 4 Part 1...

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Superposition Chapter 4 – Part 1

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Learning Objectives What are linear circuits? What is the Superposition Principle? How can we turn off a voltage source? How can we turn off a current source? When can superposition be used?
Linear Circuit Elements Resistors are linear circuit elements: V = IR is clearly a straight line. Ideal capacitors and inductors are linear. Independent sources are linear. Dependent sources are linear provided that the output voltage or current is proportional to the first power of a specified voltage or current (or a sum of these).

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Nonlinear Circuit Elements Semiconductor devices are nonlinear. Diodes Transistors Many other real world devices are nonlinear although their response may be approximately linear over a limited range.
Linear Circuits A linear circuit is a circuit composed exclusively of linear circuit elements. 3 A 5 10 40 + 50 V -

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Superposition Superposition is a property of all linear systems: [ ] [ ] ) ( ) ( ) ( y f b x f a by ax f + = +
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