Dynamic converter reconfiguration for near-threshold non-volatile processors using in-door energy harvesting

Caiwen Ding, Hongjia Li, Jingtong Hu, Yongpan Liu, Yanzhi Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Energy harvesting is becoming a preferred choice for future wearable embedded systems compared to batteries because of size, longevity, and maintenance convenience. However, harvested energy is intrinsically unstable. In order to overcome this drawback, non-volatile processors (NVPs) have been proposed to bridge intermittent program execution. However, the harvested power is limited even with multiple energy harvesters when they are in-door. Therefore, a near-threshold processor is ideal to maintain low power consumption. One of the biggest challenges in realizing near-threshold non-volatile processor is to provide a required high write voltage to non-volatile memories when there is a power failure and checkpoint is needed. In order to address this challenge, in this paper, we propose a dynamic converter reconfiguration for ambient energy harvesting-based NVPs to support near-threshold computing. We further investigate thorough optimization techniques to achieve high robustness in reconfiguration and checkpointing, high conversion efficiency, and low ripple magnitude. Experimental results demonstrate that the proposed techniques can significantly reduce the power consumption and improve the performance of energy harvesters and NVPs.

Original languageEnglish (US)
Title of host publicationProceedings of the 34th IEEE International Conference on Computer Design, ICCD 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages289-295
Number of pages7
ISBN (Electronic)9781509051427
DOIs
StatePublished - Nov 22 2016
Event34th IEEE International Conference on Computer Design, ICCD 2016 - Scottsdale, United States
Duration: Oct 2 2016Oct 5 2016

Other

Other34th IEEE International Conference on Computer Design, ICCD 2016
CountryUnited States
CityScottsdale
Period10/2/1610/5/16

Keywords

  • energy harvesting
  • Near-Threshold Computing (NTC)
  • Non-volatile processor (NVP)
  • Reconfiguration

ASJC Scopus subject areas

  • Hardware and Architecture

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    Ding, C., Li, H., Hu, J., Liu, Y., & Wang, Y. (2016). Dynamic converter reconfiguration for near-threshold non-volatile processors using in-door energy harvesting. In Proceedings of the 34th IEEE International Conference on Computer Design, ICCD 2016 (pp. 289-295). [7753292] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICCD.2016.7753292