Coupling dynamics of Nb/Nb₂O₅ relaxation oscillators

Abstract

The coupling dynamics of capacitively-coupled Nb/Nb₂O₅ relaxation oscillators are shown to exhibit rich collective behaviour depending on the negative differential resistance response of the individual devices, the operating voltage and the coupling capacitance. These coupled oscillators are shown to exhibit stable frequency and phase locking states at source voltages as low as 2.2 V, with frequency control in the range from 0.85 to 16.2 MHz and frequency tunability of ∼8 MHz/V. The experimental realisation of such compact, scalable and low power coupled-oscillator systems is of particular significance for development and implementation of large oscillatory network in non-Boolean computing architecture