Unified Model, and Novel Reverse Recovery Nonlinearities, of the Driven Diode Resonator

Details Unified Model, and Novel Reverse Recovery Nonlinearities, of the Driven Diode Resonator Unified Model, and Novel Reverse Recovery Nonlinearities, of the Driven Diode Resonator

2003-01-08

arxiv.org/abs/nlin/0301009v2

Phys. Rev. E 68, 026201 (2003).

Nonlinear Sciences

Chaotic Dynamics

10 pages, 8 figures, 1 table, submitted to Phys. Rev. E. Revised version with changes suggested by the referees

Scientific paper

10.1103/PhysRevE.68.026201

We study the origins of period doubling and chaos in the driven series resistor-inductor-varactor diode (RLD) nonlinear resonant circuit. We find that resonators driven at frequencies much higher than the diode reverse recovery rate do not show period doubling, and that models of chaos based on the nonlinear capacitance of the varactor diode display a reverse-recovery-like effect, and this effect strongly resembles reverse recovery of real diodes. We find for the first time that in addition to the known dependence of the reverse recovery time on past current maxima, there are also important nonlinear dependencies on pulse frequency, duty-cycle, and DC voltage bias. Similar nonlinearities are present in the nonlinear capacitance models of these diodes. We conclude that a history-dependent and nonlinear reverse recovery time is an essential ingredient for chaotic behavior of this circuit, and demonstrate for the first time that all major competing models have this effect, either explicitly or implicitly. Besides unifying the two major models of RLD chaos, our work reveals that the nonlinearities of the reverse recovery time must be included for a complete understanding of period doubling and chaos in this circuit.

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