8.7 CIRCUIT THEOREMS IN SINUSOIDAL STEADY-STATE ANALYSIS
Sinusoidal steady-state, as we have defined, is a concept relevant only to a linear dynamic circuit. A non-linear circuit excited by a sinusoidal waveform may reach a steady-state; but that steady-state will not be a sinusoidal steady-state since the response of a non-linear circuit to a sinusoidal waveform may contain a distorted and non-sinusoidal content. Phasors and phasor equivalent circuits are applicable only if all response variables are sinusoidal waveforms with a frequency equal to that of the input, i.e., only if the dynamic circuit is linear.
All circuit theorems we developed in Chapter 5, except the Maximum Power Transfer Theorem, are applicable to phasor equivalent circuits ...
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