Coherence resonance in an unijunction transistor relaxation oscillator
Md. Nurujjaman, P.S. Bhattacharya, and A.N. Sekar Iyengar, Sandip, Sarkar
TL;DR
This study investigates coherence resonance in an unijunction transistor relaxation oscillator, analyzing how noise influences oscillation coherence and identifying conditions that minimize degradation of coherence.
Contribution
It provides experimental insights into coherence resonance in UJT-RO and highlights the impact of noise interference on oscillation coherence.
Findings
Coherence resonance observed in UJT-RO.
Normal variance varies with noise amplitude.
Interference of noise reduces coherence at high noise levels.
Abstract
The phenomenon of coherence resonance (CR) is investigated in an unijunction transistor relaxation oscillator (UJT-RO) and quantified by estimating the normal variance (NV). Depending upon the measuring points two types of NV curves have been obtained. We have observed that the degradations in coherency at higher noise amplitudes in our system is probably the result of direct interference of coherent oscillations and the stochastic perturbation. Degradation of coherency may be minimal if this direct interference of noise and coherent oscillations is eliminated.
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