28nm 0.3V 1W2R Sub-Threshold FIFO Memory for Multi-Sensor IoT Applications

Huan Jan Tseng, Po Tsang Huang, Shang Lin Wu, Sheng Chi Lung, Wei Chang Wang, Wei Hwang, Ching Te Chuang

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

Abstract

For energy-constrained multi-sensing IoT devices, ultra-low-power queueing is one of the critical event-driven design challenges to capture low-speed sensing data with various sampling frequencies. In this paper, 0.3V 1W2R sub-threshold FIFO memory is proposed for ultra-low-voltage operations using Schmitt-Trigger (ST) 12.5T SRAM bit-cell, ripple bitline structure and cross-point data-aware write wordline scheme. The ST 12.5T memory bit-cell not only increases hold static noise margin (HSNM) but also eliminates write half-select disturbance for robust sub-threshold operation. Secondly, an adaptive timing tracing circuitry and negative bit-line circuits are employed in the design for PVT variation-tolerant read operation and write ability enhancement. Thirdly, the proposed ripple bitline structure divides the bitline into several segments for ultra-low-voltage operations. Thus, the access time can be reduced apparently. Finally, a 4kb sub-threshold FIFO memory with the proposed multi-port ST 12.5T bit-cells is implemented by UMC 28nm HKMG technology. The proposed FIFO memory can execute one write and two read operations simultaneously for multi-sensor IoT applications. The average power and maximum write frequency are 4.01 μ W and 780kHz at 0.3V, respectively.

Original languageEnglish
Title of host publicationProceedings - 32nd IEEE International System on Chip Conference, SOCC 2019
EditorsDanella Zhao, Arindam Basu, Magdy Bayoumi, Gwee Bah Hwee, Ge Tong, Ramalingam Sridhar
PublisherIEEE Computer Society
Pages248-253
Number of pages6
ISBN (Electronic)9781728134826
DOIs
StatePublished - Sep 2019
Event32nd IEEE International System on Chip Conference, SOCC 2019 - Singapore, Singapore
Duration: 3 Sep 20196 Sep 2019

Publication series

NameInternational System on Chip Conference
Volume2019-September
ISSN (Print)2164-1676
ISSN (Electronic)2164-1706

Conference

Conference32nd IEEE International System on Chip Conference, SOCC 2019
CountrySingapore
CitySingapore
Period3/09/196/09/19

Keywords

  • FIFO memory
  • multi-port SRAM
  • Schmitt Trigger
  • sub-threshold SRAM

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