Switching dynamics of single and coupled VO2-based oscillators as
elements of neural networks
- URL: http://arxiv.org/abs/2001.01854v1
- Date: Tue, 7 Jan 2020 02:16:04 GMT
- Title: Switching dynamics of single and coupled VO2-based oscillators as
elements of neural networks
- Authors: Andrei Velichko, Maksim Belyaev, Vadim Putrolaynen, Alexander
Pergament, and Valentin Perminov
- Abstract summary: We report on the switching dynamics of both single and coupled VO2-based oscillators, with resistive and capacitive coupling, and explore the capability of their application in neural networks.
For the resistive coupling, it is shown that synchronization takes place at a certain value of the coupling resistance, though it is unstable and a synchronization failure occurs periodically.
For the capacitive coupling, two synchronization modes, with weak and strong coupling, are found. The transition between these modes is accompanied by chaotic oscillations.
- Score: 55.41644538483948
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In the present paper, we report on the switching dynamics of both single and
coupled VO2-based oscillators, with resistive and capacitive coupling, and
explore the capability of their application in oscillatory neural networks.
Based on these results, we further select an adequate SPICE model to describe
the modes of operation of coupled oscillator circuits. Physical mechanisms
influencing the time of forward and reverse electrical switching, that
determine the applicability limits of the proposed model, are identified. For
the resistive coupling, it is shown that synchronization takes place at a
certain value of the coupling resistance, though it is unstable and a
synchronization failure occurs periodically. For the capacitive coupling, two
synchronization modes, with weak and strong coupling, are found. The transition
between these modes is accompanied by chaotic oscillations. A decrease in the
width of the spectrum harmonics in the weak-coupling mode, and its increase in
the strong-coupling one, is detected. The dependences of frequencies and phase
differences of the coupled oscillatory circuits on the coupling capacitance are
found. Examples of operation of coupled VO2 oscillators as a central pattern
generator are demonstrated.
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