1. Lecture 6 Nodal Analysis Section 4.1-4.4 Jack Ou, Ph.D.

2. Definitions

3. Nodes

4. Branch

5. Essential Node

6. Step 1: Number of Nodal Voltage Equations n e is essential nodes Number of nodal voltage Equations is n e -1 n e is 3 2 nodal voltage equations are required.

7. Step 2: Designate a node as the reference node. Suggestion: Select the node with the most branches.

8. Step 3: Define the Node Voltage on the Diagram

9. Step 4: Apply KCL Sum Currents Away from Essential Node

10. Example 4.2

11. Example 4.3

12. Supernode When a voltage source is between two essential nodes, we can combine these nodes to form a supernode.