Summary
We study the signal-to-noise ratio, signal and noise output levels in a fast bistable electronic system: a tunnel diode. We observe stochastic resonance when the system is driven by a sum of a small periodic signal and noise. The phenomenon is investigated for values of the driving frequency as high as 10 kHz. This is the highest frequency value used in SR experiments until now. In the presence of «white noise», we observe a nonmonotonic behavior characterized by a sharp dip in the output noise level measured at 100Hz and 1 kHz. A similar behavior is predicated by recent theories. We also present preliminary experimental results of SR in the presence of an Ornstein-Uhlenbeck noise. For the set of investigated values of the correlation time of the noise, we still observe the characteristic dip in the output noise levels. The height of the dip is affected by the correlation time of the noise.
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Mantegna, R.N., Spagnolo, B. Stochastic resonance in a tunnel diode in the presence of white or coloured noise. Il Nuovo Cimento D 17, 873–881 (1995). https://doi.org/10.1007/BF02451845
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DOI: https://doi.org/10.1007/BF02451845