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Hardware Implementation of Ring Oscillator Networks Coupled by BEOL Integrated ReRAM for Associative Memory Tasks

Year: 2025
Type: preprint
Abstract: We demonstrate the first hardware implementation of an oscillatory neural network (ONN) utilizing resistive memory (ReRAM) for coupling elements. A ReRAM crossbar array chip, integrated into the Back End of Line (BEOL) of CMOS technology, is leveraged to establish dense coupling elements between oscillator neurons, allowing phase-encoded analog information to be processed in-memory. We also realize an ONN architecture design with the coupling ReRAM array. To validate the architecture experimentally, we present a conductive metal oxide (CMO)/HfOx ReRAM array chip integrated with a 2-by-2 ring oscillator-based network. The system successfully retrieves patterns through correct binary phase locking. This proof of concept underscores the potential of ReRAM technology for large-scale, integrated ONNs.
DOI: 10.48550/arxiv.2503.14126
Authors: Choi, Wooseok, van Bodegraven, Thomas, Verest, Jelle, Maher, Olivier, Falcone, Donato Francesco, La Porta, Antonio, Jubin, Daniel, Offrein, Bert Jan, Karg, Siegfried, Bragaglia, Valeria, Todri-Sanial, Aida
Language: English
Open Access status: green
OpenAlex ID: W6929481256
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