Phys. Rev. E 71, 062101 (2005) [4 pages]Coherence resonance in excitable electronic circuits in the presence of colored noiseReceived 24 August 2004; revised 21 March 2005; published 13 June 2005 We give evidence of coherence resonance in an excitable electronic circuit whose dynamics obeys the FitzHugh-Nagumo model system, under the application of different noise sources, ranging from Gaussian white noise to colored 1∕f2 noises. The resonance behavior can be significantly reinforced when experimental parameters are tuned in order to place the stable fixed point closer to the excitability threshold of spiking behavior, as well as when the time scales of the circuit are properly modified. A quantitative description of the effects of noise correlations in inducing the resonant behavior is provided. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.71.062101
DOI:
10.1103/PhysRevE.71.062101
PACS:
05.45.Xt, 05.40.−a
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