1 EE201 Linear Circuit Analysis I Lecture 8. Topics: Mesh (Loop) Analysis 1. Loop (Mesh) Analysis – Basics (1) The concepts of loops, loop currents & branch currents • Loops • Loop currents: I1, I2(may NOT be the actual current flowing in a branch). • Branch current IL= I1– I2 (this is the ACTUAL current flowing in a branch). • Ohm’s Law applies to branch current, VL= IL· R. • Ohm’s Law may or may not apply to loop currents. (2) How to write loop equations: • The goal of loop analysis is to find all the branch currents. • 3 Steps: Step 1- Use KVL to sum the voltages around a loop; Step 2 - Use Ohm’s law to express voltages in terms of loop currents; Step 3 - Use loop currents to compute branch currents. Example. Loop 1: +-↑+VL–I2I1IL↓RL
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