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Functional Connectivity of Organic Neuromorphic Devices by Global Voltage Oscillations

Accepted version
Peer-reviewed

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Type

Article

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Authors

Koutsouras, Dimitrios A 
Prodromakis, Themis 
Malliaras, George G 
Blom, Paul WM 
Gkoupidenis, Paschalis  ORCID logo  https://orcid.org/0000-0002-0139-0851

Abstract

jats:sec<jats:label />jats:pGlobal oscillations in the brain synchronize neural populations and lead to dynamic binding between different regions. This functional connectivity reconfigures as needed for the architecture of the neural network, thereby transcending the limitations of its hardwired structure. Despite the fact that it underlies the versatility of biological computational systems, this concept is not captured in current neuromorphic device architectures. Herein, functional connectivity in an array of organic neuromorphic devices connected through an electrolyte is demonstrated. The output of these devices is shown to be synchronized by a global oscillatory input despite the fact that individual inputs are stochastic and independent. This temporal coupling is induced at a specific phase of the global oscillation in a way that is reminiscent of phase locking of neurons to brain oscillations. This demonstration provides a pathway toward new neuromorphic architectural paradigms, where dynamic binding transcends the limitations of structural connectivity, and could enable architectural concepts of hierarchical information flow.</jats:p></jats:sec>

Description

Keywords

electrolytes, functional connectivity, neuromorphic devices, organic electrochemical transistors, PEDOT:PSS

Journal Title

ADVANCED INTELLIGENT SYSTEMS

Conference Name

Journal ISSN

2640-4567
2640-4567

Volume Title

1

Publisher

Wiley

Rights

All rights reserved