Il Nuovo Cimento D

, Volume 17, Issue 7–8, pp 873–881

Stochastic resonance in a tunnel diode in the presence of white or coloured noise

  • R. N. Mantegna
  • B. Spagnolo


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.

PACS 85.30.Mn

Junction breakdown and tunneling devices 

PACS 02.50

Probability theory, stochastic processes, and statistics 

PACS 05.20

Statistical mechanics 

PACS 01.30.Cc

Conference proceedings 


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Copyright information

© Società Italiana di Fisica 1995

Authors and Affiliations

  • R. N. Mantegna
    • 1
  • B. Spagnolo
    • 3
  1. 1.Istituto Nazionale di Fisica della Materia, Unità di Palermo Dipartimento di Energetica ed Applicazioni di FisicaUniversità di PalermoPalermoItaly
  2. 2.Center for Polymer StudiesBoston UniversityBostonUSA
  3. 3.Department of PhysicsBoston UniversityBostonUSA

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