Excitation of electronic neuron-like generator with pulse stimulation
M.A. Mishchenko1, D.I. Bolshakov1, V.V. Matrosov1, I.V. Sysoev1,2,3
1National Research Lobachevsky State University, Nizhniy Novgorod, Russia
2Saratov State University, Saratov, Russia
3Saratov Branch of Institute of Radioengineering and Electronics of RAS, Saratov, Russia
Abstract
Neuromorphic technologies are among the most actual interdisciplinary fields of science. Neuromorphic devices are developing to implement principles and algorithms of brain information processing in computational systems. Neuromorphic devices require development of electronic components: neurons and synapses.
In paper [1] phase-locked loop with bandpass filter in control loop was proposed. The oscillations generated by this circuit are similar to spiking and bursting oscillations of membrane potential of living neurons. Electronic implementation of such neuron-like generator demonstrates the same dynamic modes [2].
Significant disadvantage of the proposed neuron-like generator based on PLL is the absence of non-oscillating dynamic mode. The excitability is a key feature of neurons. Neurons are excitable in the sense that they are typically at rest but can fire spikes in response to certain forms of stimulation.
To eliminate this disadvantage and implement excitable mode we have modified the neuron-like generator. The switch activated by the signal over threshold has been included in the circuit between lowpass and highpass branches of the loop filter.
The excitability of the proposed generator is studied under external pulse stimulation. Experimental study of electronic neuron-like generator with excitable and self-oscillating modes have conducted. Spiking and bursting self-oscillating modes known from numerical simulations were observed. Novel excitable dynamics was studied in presence of external pulse stimulation.
This work was supported by the grant of the President of Russian Federation No MD-3006.2021.1.2.
[1] V.D. Shalfeev “Investigation of the dynamics of a system of automatic phase control of frequency with a coupling capacitor in the control loop” Radiophys. Quantum Electron., vol. 11(3), pp 221–226, 1968.
[2] M.A. Mishchenko, D.I. Bolshakov, V.V. Matrosov, “Instrumental implementation of a neuronlike generator with spiking and bursting dynamics based on a phase-locked loop” Tech. Phys. Lett., vol. 43(7), pp.596–599, 2017.
Speaker
Mikhail A. Mishchenko
National Research Lobachevsky State University of Nizhniy Novgorod
Russia
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