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ECE201Lect-12-1

# ECE201Lect-12-1 - ECE201 Lect-12 1...

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Unformatted text preview: ECE201 Lect-12 1 Equivalence/Linearity (5.1); Superposition (5.2, 8.8) ECE201 Lect-12 2 Equivalent Sources • An ideal current source has the voltage necessary to provide its rated current. • An ideal voltage source supplies the current necessary to provide its rated voltage. • A real voltage source cannot supply arbitrarily large amounts of current. • A real current source cannot have an arbitrarily large terminal voltage. ECE201 Lect-12 3 A More Realistic Source Model v s ( t ) R s The Circuit The Source i ( t ) + – v ( t ) + – ECE201 Lect-12 4 I-V Relationship The I-V relationship for this source model is v ( t ) = v s ( t ) - R s i ( t ) v ( t ) i ( t ) ECE201 Lect-12 5 Open Circuit Voltage • If the current flowing from a source is zero, then the source is connected to an open circuit. • The voltage at the source terminals with i ( t ) equal to zero is called the open circuit voltage : v oc ( t ) ECE201 Lect-12 6 Short Circuit Current • If the voltage across the source terminals is zero, then the source is connected to a short circuit. • The current that flows when v ( t ) equals zero is called the short circuit current : i sc ( t ) ECE201 Lect-12 7 v oc ( t ) and i sc ( t ) v ( t ) i ( t ) v oc ( t ) i sc ( t ) ECE201 Lect-12...
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ECE201Lect-12-1 - ECE201 Lect-12 1...

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