公开(公告)号：US20250048940A1

公开(公告)日：2025-02-06

申请号：US18228736

申请日：2023-08-01

Applicant: STMicroelectronics International N.V.

Inventor： Andrea REDAELLI ,  Luca LAURIN

IPC: H10N70/20 ,  G11C13/00 ,  H10B63/00 ,  H10N70/00

Abstract: An in-memory computation (IMC) system includes an in-memory computation circuit formed by a first phase change memory (PCM) array configured to store the computational weights for an in-memory computation operation. A data storage circuit is formed by a second PCM array configured to store backup data for the computational weights for the in-memory computation operation. The first PCM array includes PCM cells made of a phase change material provided by a first GST alloy, and the second PCM array includes PCM cells made of a phase change material provided by a second GST alloy different from the first GST alloy. A control circuit operates to read the backup data from the second PCM array and write to the first PCM array to refresh the computational weights for the in-memory computation operation from the backup data.