RT info:eu-repo/semantics/conferenceObject T1 Low-energy inference machine with multilevel HfO2 RRAM arrays A1 Milo, V. A1 Zambelli, Cristian A1 Olivo, P. A1 Pérez, Eduardo A1 González Ossorio, Óscar A1 Wenger, Christian A1 Ielmini, Daniele K1 Resistive RAM memory (RRAM) K1 Memoria RAM resistiva (RRAM) K1 Machine learning K1 Aprendizaje automatizado K1 Neural network K1 Red neuronal K1 1203.04 Inteligencia Artificial AB Recently, artificial intelligence reached impressive milestones in many machine learning tasks such as the recognition of faces, objects, and speech. These achievements have been mostly demonstrated in software running on high-performance computers, such as the graphics processing unit (GPU) or the tensor processing unit (TPU). Novel hardware with in-memory processing is however more promising in view of the reduced latency and the improved energy efficiency. In this scenario, emerging memory technologies such as phase change memory (PCM) and resistive switching memory (RRAM), have been proposed for hardware accelerators of both learning and inference tasks. In this work, a multilevel 4kbit RRAM array is used to implement a 2-layer feedforward neural network trained with the MNIST dataset. The performance of the network in the inference mode is compared with recently proposed implementations using the same image dataset demonstrating the higher energy efficiency of our hardware, thanks to low current operation and an innovative multilevel programming scheme. These results support RRAM technology for in-memory hardware accelerators of machine learning. PB IEEE Xplore SN 978-1-7281-1539-9 YR 2019 FD 2019 LK http://uvadoc.uva.es/handle/10324/45430 UL http://uvadoc.uva.es/handle/10324/45430 LA eng NO 49th European Solid-State Device Research Conference (ESSDERC 2019). Cracovia, Polonia: IEEE Xplore, 2019, p. 174-177 NO Producción Científica DS UVaDOC RD 29-may-2024