RRAM-based 7T1R Nonvolatile SRAM with 2x Reduction in Store Energy and 94x Reduction in Restore Energy for Frequent-Off Instant-On Applications

被引：48

作者：

Lee, Albert ^{[1
]}

Chang, Meng-Fan ^{[1
]}

Lin, Chien-Chen ^{[1
]}

Chen, Chien-Fu ^{[1
,2
]}

Ho, Mon-Shu ^{[3
]}

Kuo, Chia-Chen ^{[4
]}

Tseng, Pei-Ling ^{[4
]}

Sheu, Shyh-Shyuan ^{[4
]}

Ku, Tzu-Kun ^{[4
]}

机构：

[1] Natl Tsing Hua Univ, Hsinchu 30013, Taiwan

[2] NDL, Taipei, Taiwan

[3] Natl Chung Hsin Univ, Taipei, Taiwan

[4] ITRI, EOL, Taipei, Taiwan

来源：

2015 SYMPOSIUM ON VLSI CIRCUITS (VLSI CIRCUITS) | 2015年

关键词：

D O I：

10.1109/VLSIC.2015.7231368

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

This study proposes a 7T1R nonvolatile SRAM (nvSRAM) to 1) reduce store energy by using a single NVM device, 2) suppress DC-short current during restore operations through the use of a pulsed-overwrite (POW) scheme, and 3) achieves high restore yield by using a differentially supplied initialization (DSI) scheme. This initialization-and-overwrite (IOW) 7T1R nvSRAM improves breakeven-time (BET) by 6+x, compared to previous nvSRAMs. We fabricated a 16Kb IOW-7T1R nvSRAM using HfOx RRAM and a 90nm process. This represents the first ever silicon verified single-NVM nvSRAM macro. Measurements obtained in test-mode confirm that the proposed nvSRAM reduces store energy by 2x and restore energy by 94x, compared to 2R-based nvSRAMs.

引用

页数：2

共 7 条

[1]

Chiu P. F, 2010, IEEE VLSIC, P229

[2]

Ohsawa T., 2013, IEEE JSSC, P1511

[3]

Sheu SS, 2013, IEEE ASIAN SOLID STA, P245, DOI 10.1109/ASSCC.2013.6691028

[4]

Shyh-Shyuan Sheu, 2011, 2011 IEEE International Solid-State Circuits Conference (ISSCC 2011), P200, DOI 10.1109/ISSCC.2011.5746281

[5]

Wei W., 2014, IEEE T NANOTECHNOL, P905

[6] Nonvolatile SRAM (NV-SRAM) Using Functional MOSFET Merged with Resistive Switching Devices [J].

Yamamoto, Shuu'ichirou ;

Shuto, Yusuke ;

Sugahara, Satoshi .

PROCEEDINGS OF THE IEEE 2009 CUSTOM INTEGRATED CIRCUITS CONFERENCE, 2009, :531-+

[7]

Zhao H, 2007, GLOB TELECOMM CONF, P4000

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