Bitwise Logical Operations in VCMA-MRAM

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Today's technology demands compact, portable, fast, and energy-efficient devices. One approach to making energy-efficient devices is an in-memory computation that addresses the memory bottleneck issues of the present computing system by utilizing a spintronic device viz. magnetic tunnel junction (MTJ). Further, area and energy can be reduced through approximate computation. We present a circuit design based on the logic-in-memory computing paradigm on voltage controlled magnetic anisotropy magnetoresistive random access memory (VCMA-MRAM). During the computation, multiple bit cells within the memory array are selected that are in parallel by activating multiple word lines. The designed circuit performs all logic operations-NOT, AND-NAND, OR-NOR, and arithmetic operation SUM (1-bit approximate adder with 75% accuracy for SUM and accurate carry out) by slight modification using control signals. All the simulations have been performed at a 45 nm CMOS technology node with VCMA-MTJ compact model by using the HSPICE simulator. Simulations show that the 1-bit approximate adder saves 52% energy, reduces hardware count by 72%, and delays by 44.3% compared to its counterpart 1-bit exact adder.

Original languageEnglish (US)
Title of host publicationAPCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages439-443
Number of pages5
ISBN (Electronic)9781665450737
DOIs
StatePublished - 2022
Event2022 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2022 - Virtual, Online, China
Duration: Nov 11 2022Nov 13 2022

Publication series

NameAPCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems

Conference

Conference2022 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2022
Country/TerritoryChina
CityVirtual, Online
Period11/11/2211/13/22

Bibliographical note

Publisher Copyright:
© 2022 IEEE.

Keywords

  • Magnetic tunnel junction (MTJ)
  • multi-functional circuit
  • TMR
  • VCMA assisted STT switching
  • VCMA-MRAM

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering
  • Artificial Intelligence
  • Computer Science Applications

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