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Unformatted text preview: ECE 201 Lecture 11 Source Transformations Linearity and Superposition + + Setting Source to Zero Rest of circuit + Let V s =0 Rest of circuit Voltage source: Current source: Rest of circuit Let I s =0 Rest of circuit replaced by short circuit replaced by open circuit TwoTerminal Networks • A twoterminal network is a network of circuit elements with only two terminals available for connection with other circuits • Examples of twoterminal networks Twoterminal network + + VI Characteristic of TwoTerminal Networks The vi characteristic of a twoterminal network is the voltage drop v across it expressed as a function of the current i through it ( using the passive sign convention ). Twoterminal network Twoterminal network To obtain the vi characteristic by experiment: • Connect the twoterminal network to an independent current source with adjustable i • Measure v for different i • Plot the graph of v as a function of i • A resistor with resistance R • By Ohm’s Law, • vi characteristic is a line through the origin VI Characteristic of Resistors Slope R •...
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 Spring '11
 Cheng
 Thévenin's theorem, Current Source, vi characteristic, Independent Voltage Source, independent current source

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