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research article

Switching event detection and self-termination programming circuit for energy efficient ReRAM memory arrays

Alayan, Mouhamad
•
Muhr, Eloi
•
Levisse, Alexandre Sébastien Julien  
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2019
IEEE Transactions on Circuits and Systems II

Energy efficiency remains a challenge for the design of non-volatile resistive memories (ReRAMs) arrays. This memory technology suffers from intrinsic variability in switching speed, programming voltages and resistance levels. The programming conditions of memory elements (e.g. pulse widths and amplitudes) must cover the tail bits to avoid programming failures. Switching time of ReRAMs shows wide distributions. Therefore, fast cells are subjects for electrical stress after their switching and energy waste since programming currents are typically large for this technology (tens of µA). In this paper, we present a Write Termination (WT) circuit to stop the programming operation when the switching event occurs in the selected memory element. The proposed design is sensitive to current variations that take place when the memory element switches between two different resistance states (LRS and HRS). This WT scheme reduces the power consumption by 97+%, 93+% and 65+% during Forming, RESET and SET operations respectively. Our estimations show that area efficiency of 70% for a memory array is achievable when the presented WT circuit is integrated in near-memory peripheries. The demonstrated WT circuit is suitable for different ReRAM technologies with small overhead penalty and shows robustness against CMOS and ReRAM variabilities.

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Type
research article
DOI
10.1109/TCSII.2019.2908967
Author(s)
Alayan, Mouhamad
Muhr, Eloi
Levisse, Alexandre Sébastien Julien  
Bocquet, Marc
Moreau, Mathieu
Nowak, Etienne
Molas, Gabriel
Vianello, Elisa
Portal, Jean Michel
Date Issued

2019

Published in
IEEE Transactions on Circuits and Systems II
Volume

66

Issue

5

Start page

748

End page

752

Subjects

ReRAM

•

Write termination

•

WT

•

Switching time

•

Energy efficiency

•

Area overhead

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
ESL  
Available on Infoscience
April 8, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/155937
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