ECEN 215, Principles of Electrical EngineeringDr. Mina RahimianLecture# 7 Date: 9/16/13Maximum Power TransferTo maximizes the power transfered from a circuit to a load, we can replace the circuit by its Thevenin equivalent circuit and connect it to an adjustable load and find the load value for which the power is maximum.VTh and RTh are fixed. To find the value of RL which maximizes the power, we need to differentiate P with respect to RL and set it equal to zero.Ex: Find RL for maximum power transfer. Find the maximum power.Ex: Find RL for maximum power transfer. Find the maximum power.Ex: Find RL for maximum power transfer. Find the maximum power.Principle of SuperpositionA linear system obeys the principle of super position, which states that whenever a system is excited by more than one independent sources, the total response is the sum of the individual responses. Keep only one independent source at a time and turn off the remaining independent sources. Find the response to that source and repeat this for all independent sources. The total response is the sum of the responses.A linear system is one whose output is linearly proportional to its
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