lecture08 - Lecture #8 ANNOUNCEMENTS HW#2 solutions, HW#3...

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Lecture 8, Slide 1 EECS40, Fall 2003 Prof. King Lecture #8 ANNOUNCEMENTS • HW#2 solutions, HW#3 are posted online • Change in Farhana’s O.H. : Th 5-6 instead of Mo 3-4 • Prof. King will be away next Monday & Wednesday – Guest lecturer: Prof. Neureuther – Prof. King’s office hour on Wed. 9/17 cancelled OUTLINE • Thévenin and Norton equivalent circuits • Maximum power transfer • Superposition Reading Chapter 4.10-4.13 Lecture 8, Slide 2 EECS40, Fall 2003 Prof. King Thévenin Equivalent Circuit • Any network of voltage sources, current sources, and resistors can be replaced by an equivalent circuit consisting of an independent voltage source in series with a resistor without affecting the operation of the rest of the circuit. network of sources and resistors + V Th R Th R L i L + v L a b R L i L + v L a b Thévenin equivalent circuit “load” resistor
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Lecture 8, Slide 3 EECS40, Fall 2003 Prof. King I-V Characteristic of Thévenin Equivalent The I-V characteristic for the series combination of elements is obtained by adding their voltage drops: + V Th R Th a b i i + v ab v = V Th + iR I-V characteristic of resistor: v = iR I-V characteristic of voltage source: v = V Th For a given current i , the voltage drop v ab is equal to the sum of the voltages dropped across the source ( V Th ) and the across the resistor ( iR Th ) v Lecture 8, Slide 4 EECS40, Fall 2003 Prof. King Finding V Th and R Th Only two points are needed to define a line.
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lecture08 - Lecture #8 ANNOUNCEMENTS HW#2 solutions, HW#3...

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