Two methods of obtaining the response of a R L C circuit containing a non¬linear inductor to an arbitrary applied voltage are discussed. One method makes use of the phase portrait of the circuit the other, of the φ-i relationship for the inductor. A method of evaluating the coefficients in a. polynomial approximation to the two paths of a hysteresis loop is presented. This evaluation is made from a set of tuned voltmeter readings. A RLC circuit with nonlinear resistance is analyzed in a novel manner. A bibliography of material related to nonlinear circuits is presented.
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