The frequency of a nonlinear oscillator with a perturbing force
A.S. Gladwin · Proceedings of the IEEE · 1967
A current, represented as the sum of a number of sinusoidal components, is injected into an oscillator comprising a linear network connected to a nonlinear negative resistance. It is shown how the oscillator frequency depends on the magnitudes of the perturbation and on the voltages of various frequencies produced by it.