A write-improved low-power 12T SRAM cell for wearable wireless sensor nodes

Vishal Sharma, Santosh Vishvakarma*, Shailesh Singh Chouhan, Kari Halonen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)
142 Downloads (Pure)

Abstract

In this work, a data-dependent feedback-cutting–based bit-interleaved 12T static random access memory (SRAM) cell is proposed, which enhances the write margin in terms of write trip point (WTP) and write static noise margin (WSNM) by 2.14× and 8.99× whereas read stability in terms of dynamic read noise margin (DRNM) and read static noise margin (RSNM) by 1.06× and 2.6 ×, respectively, for 0.4 V when compared with a conventional 6T SRAM cell. The standby power has also been reduced to 0.93× with an area overhead of 1.49× as that of 6T. Monte Carlo simulation results show that the proposed cell offers a robust write margin when compared with the state-of-the-art memory cells available in the literature. An analytical model of WSNM for 12T operating in subthreshold region is also proposed, which has been verified using the simulation results. Finally, a small SRAM macro along with its independent memory controller has been designed.

Original languageEnglish
Pages (from-to)2314-2333
JournalInternational Journal of Circuit Theory and Applications
Volume46
Issue number12
DOIs
Publication statusPublished - Dec 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • circuit design
  • low-power
  • SRAM
  • stability
  • write ability

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