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14-03-2020 | Technical Paper

Design of SRAM cell for low power portable healthcare applications

Authors: Soumitra Pal, Subhankar Bose, Aminul Islam

Published in: Microsystem Technologies | Issue 3/2022

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Abstract

Biomedical applications such as body area networks (BANs) require the design of power-efficient SRAM cells for the extended battery lives of BAN sensor nodes. In this work, we have proposed a bit-interleaving supporting, robust, low-power single-ended 9T (SE9T) bitcell. Design metrics of our bitcell are compared with several bitcells such as the 7T, FD8T and SEDF9T cells for their comparative analysis. The proposed cell shows 2.87×/3.36× higher RSNM than that of 7T/FD8T and 1.05×/1.5×/7.0× higher WSNM than that of 7T/FD8T/SEDF9T, 1.15×/1.06× and 1.54×/1.38× lower distribution in T_RA and I_READ, respectively, compared to 7T/FD8T. In addition, the proposed cell shows 1.15×/1.22× shorter T_WA when compared to SEDF9T/7T. Furthermore, SE9T cell consumes 10.80×/17.81× lower write power than that of SEDF9T/FD8T and 1.52×/18.37× lower read power than that of 7T/FD8T. It also exhibits 1.04×/2.92× lower leakage power dissipation than that of FD8T/7T. All these developments are obtained at a cost of 2.5× longer T_WA, 1.73×/1.73× longer T_RA when compared to FD8T and 7T/FD8T, and 1.64×/1.06× higher write power/read power than 7T/SEDF9T @ V_DD = 700 mV.

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Title: Design of SRAM cell for low power portable healthcare applications
Authors: Soumitra Pal
Subhankar Bose
Aminul Islam
Publication date: 14-03-2020
Publisher: Springer Berlin Heidelberg
Published in: Microsystem Technologies / Issue 3/2022
Print ISSN: 0946-7076
Electronic ISSN: 1432-1858
DOI: https://doi.org/10.1007/s00542-020-04809-6

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