MemTDE

Memristive Time Difference Encoder

Partner

Elisabetta_Chicca_transparent

Prof. Elisabetta Chicca

University of Groningen

Regina_Dittmann_transparent

Prof. Regina Dittmann

Forschungszentrum Jülich

Outcome

Distributed representations enable robust multi-timescale symbolic computation in neuromorphic hardware

Madison Cotteret, Hugh Greatorex, Alpha Renner, Junren Chen, Emre Neftci, Huaqiang Wu, Giacomo Indiveri, Martin Ziegler, Elisabetta Chicca

Madison Cotteret et al 2025 Neuromorph. Comput. Eng., 7 February 2025

DOI: 10.1088/2634-4386/ada851

MemrisTec Young Researcher Awards for best oral presentation

Im Workshop MemrisTec2024 wurden Dimitris Spithouris, Johannes Hellwig und Hugh Greatorex für die beste Präsentation vom MemrisTec Board ausgezeichnet.

Resolving the Relaxation of Volatile Valence Change Memory

Johannes Hellwig, Carsten Funck, Sebastian Siegel, Alexandros Sarantopoulos, Dimitrios Spithouris, Stephan Menzel, Regina Dittmann

Advanced Electronic Materials, 17 June 2024

DOI:10.1002/aelm.202400062

MEMRISYS „Best Oral Award“ für Johannes Hellwig

Johannes Hellwig from Forschungszentrum Jülich (PGI-7) received the “Best Oral Award” for his presentation “Resolving the Physical Origin of LRS Relaxation in Valence Change Memory” at the MEMRISYS conference in Turin, which took place from November 5-9, 2023.

Vector Symbolic Finite State Machines in Attractor Neural Networks

Madison Cotteret, Hugh Greatorex, Martin Ziegler, Elisabetta Chicca

Neural Computation 36, 549–595 (2024), October 19 2023

DOI: 10.1162/neco_a_01638

A Subthreshold Second-Order Integration Circuit for Versatile Synaptic Alpha Kernel and Trace Generation

Ole Richter, Hugh Greatorex, Benjamin Hucko, Madison Cotteret, Willian Soares Girao, Ella Janotte, Michele Mastella, Elisabetta Chicca

Synaptic Normalisation for On-Chip Learning in Analog CMOS Spiking Neural Networks. In International Conference on Neuromorphic Systems (ICONS ’23), August 1-3, 2023

DOI: 10.1145/3589737.3606008

Synaptic Normalisation for On-Chip Learning in Analog CMOS Spiking Neural Networks

Michele Mastella, Hugh Greatorex, Madison Cotteret, Ella Janotte, Willian Soares Girão, Ole Richter, Elisabetta Chicca.

Synaptic Normalisation for On-Chip Learning in Analog CMOS Spiking Neural Networks. In International Conference on Neuromorphic Systems (ICONS ’23), August 1–3, 2023

DOI: 10.1145/3589737.3606007

Project Description

In the Internet of Things (IoT) era there is a growing amount of sensory data to be processed. IoT sensors often require the use of wireless communication at the cost of high power consumption. Sensors smart enough to compute data are needed to reduce the communication load and can offer the advantage of local decision making. While there are several advances in the field of sensors and sensor networks, the technology for complex processing at the sensing node is still to be developed, especially for applications requiring compact low-power systems operating with very low latencies.

In this project, we will empower a recently proposed computational element, namely the TDE, suitable for low-latency and low-power sensory information processing, with the advantages provided by a hybrid CMOS-memristive implementation. We will engineer volatile redox-based memristive devices with tailored decay times to replace the capacitor used in the CMOS implementation. This will guarantee compactness while enabling the achievement of long time constants (from hundred of milliseconds to seconds) prohibitive for analog CMOS. The combination of short (from microseconds to tens of milliseconds) and long time constants will further extend the field of application of the proposed computational module.

This project will take advantage from the synergies of two groups with strongly complementary expertise on memristive device development and analog circuit design.The device engineering and CMOS design efforts planned in this proposal will advance the state-of-the-art in memristive devices and hybrid CMOS-memristive systems. The strategy to engineer the decay times of memristive devices is based on elucidating the details of the redox-processes at the oxide-electrode interface, governing the time stability of the resistive states. The knowledge about the underlying physico-chemical processes causing the time decay will provide novel design rules for both volatile and non-volatile memristive devices in the future.

The demonstrator envisioned in this research will enable innovation in smart sensing. We will have the unique opportunity to explore a variety of sensory domains, including vision and audition and possibly touch and olfaction, therefore finding innovative solutions to open sensing problems.

Further involved scientists

Hugh_Greatorex_transparent

Hugh Greatorex

University of Groningen

Johannes_Hellwig_transparent

Johannes Hellwig

Forschungszentrum Jülich

Dimitris_Spithouris

Dimitris Spithouris

Forschungszentrum Jülich