Lecture_6 - I exists in one mesh – Directly assign the...

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1 BME 311 Network Theory John X.J. Zhang, UT Austin 1 Nodal vs. Mesh Analysis • Nodal Analysis – # of node equations < # of mesh equations – KCL on nodes Æ node voltages – Planar and nonplanar circuits – Op amp circuit • Mesh Analysis – # of mesh equations < # of node equations – KVL around meshes Æ mesh currents – Planar circuit only – Transistor circuit BME 311 Network Theory John X.J. Zhang, UT Austin 2 Find i 1 , i 2.
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2 BME 311 Network Theory John X.J. Zhang, UT Austin 3 Mesh Analysis with Current Source • Case 1: I exists in one mesh – Directly assign the mesh current i 2 = -5 A BME 311 Network Theory John X.J. Zhang, UT Austin 4 Mesh Analysis with Current Source • Case 1:
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Unformatted text preview: I exists in one mesh – Directly assign the mesh current i 2 = -5 A • Case 2: I between two meshes – Supermesh : two meshes have I in common • No current of its own • Require KCL+KVL • Constrain equation from the inside I 3 BME 311 Network Theory John X.J. Zhang, UT Austin 5 BME 311 Network Theory John X.J. Zhang, UT Austin 6 • KVL to supermesh: -20+6i 1 +10i 2 +4i 2 =0 • KCL to node 0: i 2 =i 1 +6 4 BME 311 Network Theory John X.J. Zhang, UT Austin 7 • Find I x using mesh analysis. Any supermesh? BME 311 Network Theory John X.J. Zhang, UT Austin 8 • Find v when (a) i s = 15 A (b) i s = 30 A...
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Lecture_6 - I exists in one mesh – Directly assign the...

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