Lecture17 - Chapter 4

Lecture17 - Chapter 4 - branches • However it will help...

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1 EE216 Circuit Analysis I Lecture # 17 – Chapter 4
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2 NVA – Special Case 1 – Known Voltage Known voltage at a node (wrt reference node). With a voltage source placed between an essential and the reference nodes, we have to write one less equation because we already know one node voltage, or a relation between two node voltages.
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3 0 5 50 5 3 2 2 1 2 = - + + - V V V V V 50 1 = V 0 5 100 4 2 3 3 = - + + - V V V NVA – Special Case 1 – Known Voltage
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4 NVA – Special Case 2 – Super Node When a voltage source is between two essential nodes, we can combine those nodes to form a supernode . Remember however that we don’t merge the two nodes! Supernode is something which we assume in our minds. We cannot eliminate a voltage source altogether without affecting the circuit parameters. Therefore, when writing the equation we will continue to use each node’s voltage for their respective
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Unformatted text preview: branches. • However, it will help us write ONE of the required equations directly. • For other equations we might still need the voltage source in place. 5 NVA – Special Case 2 – Super Node 4 100 4 100 3 3-= ⇒ =-+-V i V i 50 1 = V ) 1 ( 4 100 50 5 3 2 1 2 =-+ +-⇒ V V V V φ i V V 10 2 3 + = 5 50 2-= V i ) 2 ( ) 5 50 ( 10 2 2 3 -+ = ⇒ V V V Constraint Eqns 50 5 2 1 2 = + +-i V V V 6 NVA – Special Case 2 – Super Node 50 1 = V ) 1 ( 4 100 50 5 3 2 1 2 =-+ +-V V V V ) 2 ( ) 5 50 ( 10 2 2 3 -+ = V V V 7 NVA Example - Amplifier Circuit 8 NVA Example – Resistive Circuit Find current through 5 ohm resistor and power delivered by source. 9 Your Questions/Comments ???...
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This note was uploaded on 01/21/2011 for the course EE 216 taught by Professor Azharruaf during the Spring '10 term at NUCES.

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Lecture17 - Chapter 4 - branches • However it will help...

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