Ghost stochastic resonance in FitzHugh–Nagumo circuit

Abstract

The response of a neural circuit submitted to a bi-chromatic stimulus and corrupted by noise is investigated. In the presence of noise, when the spike firing of the circuit is analysed, a frequency not present at the circuit input appears. For a given range of noise intensities, it is shown that this ghost frequency is almost exclusively present in the interspike interval distribution. This phenomenon is for the first time shown experimentally in a FitzHugh-Nagumo circuit.

An analog circuit experiment on vibrational resonance of an underdamped bistable system

“…In recent decades, the dynamics of non-linear systems have received more and more researches; one of the interesting phenomena is stochastic resonance, which is the synergistic effect of noise, weak signal and non-linear system [1,2]. Stochastic resonance has extensively applications in the fields of physics, electronic communication, neuroscience, such as Josephson weak links [3], weak signal detection [4], and neural circuit [5]. Specifically, for electronic circuits, the presence of noise is generally thought to cause a reduction in the signal-to-noise ratio of the system [6,7].…”

Perception enhancement of subthreshold noisy image with vibrational resonance

“…the enhancement of a non‐linear system response with an appropriate amount of noise. This effect has been reported in climate dynamics to account for the recurrence of ice ages, in neuroscience to reveal the detection of weak subthreshold stimuli by mechanoreceptors or to explain the perception of ghost frequencies by the cochlea of the human auditory system [1, 2]. This SR paradigm provides interesting applications in signal and image processing [3–7], in electronic devices and more recently in quantum information processing [8].…”

An experimental analogue for memristor based Chua's circuit

“…The analysis of nonlinear systems using experimental circuits is always an active area of research that provides a better understanding on the theoretical concepts. The FitzHugh-Nagumo circuit for neuron model [14,15], the Lorenz oscillator based on a climate model [16] and the popular Chua's circuit [17] are few examples of this kind. In this context, several studies are made on the development of memristor based circuits, since memristors are commercially not available yet.…”