Sub-30-mV-Supply, Fully Integrated Ring Oscillator Consisting of Recursive Stacking Body-Bias Inverters for Extremely Low-Voltage Energy Harvesting

Hikaru Sebe*, Tomohisa Okumura, Shintaro Sumi, Daisuke Kanemoto, Po Hung Chen, Tetsuya Hirose

*Corresponding author for this work

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

3 Scopus citations

Abstract

This paper presents a ring oscillator (ROSC) consisting of recursive stacking body-bias inverters (RS-BBIs) for low-voltage energy harvesting. The RS-BBI is based on the conventional stacked body-bias inverter and consists of additional inverters stacked at the top and bottom of the inverter recursively. The RS-BBI increases the transconductance of MOSFETs and suppresses the leakage current due to its stacking structure, and increases the on-current of MOSFETs with the body-bias technique. The minimum supply voltage V D D,can be reduced by increasing the number of stacking inverters. Measured results indicate that our ROSCs using the RS-BBIs were able to operate at lower supply voltage as the number of stacking inverters increased. The measured lowest VDD, min was 26 mV even though not all chips were able to oscillate. All chips oscillated successfully at 30 mV.

Original languageEnglish
Title of host publicationESSCIRC 2023 - IEEE 49th European Solid State Circuits Conference
PublisherIEEE Computer Society
Pages325-328
Number of pages4
ISBN (Electronic)9798350304206
DOIs
StatePublished - 2023
Event49th IEEE European Solid State Circuits Conference, ESSCIRC 2023 - Lisbon, Portugal
Duration: 11 Sep 202314 Sep 2023

Publication series

NameEuropean Solid-State Circuits Conference
Volume2023-September
ISSN (Print)1930-8833

Conference

Conference49th IEEE European Solid State Circuits Conference, ESSCIRC 2023
Country/TerritoryPortugal
CityLisbon
Period11/09/2314/09/23

Keywords

  • Body-bias technique
  • Energy harvesting
  • Inverter
  • Recursive stacking
  • Ring oscillator

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