An all-digital, CMOS zero current switching circuit for thermal energy harvesting

Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail

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

8 Scopus citations

Abstract

This paper introduces an all digital, CMOS zero current switching (ZCS) circuit that enables a wide dynamic and a fine resolution zero current detection range for high gain (50 mV input to 1.35 V output) inductor-based DC-DC converter. Using only a 3-bit design, more than 1.5 μs dynamic range with 50 ns delay resolution is achieved. The prototype chip is designed and simulated using 65 nm low-power CMOS technology and occupies less than 0.04 mm2 area. Post-layout SPICE simulations confirm that 85% efficiency can be achieved for the overall system. The proposed circuit is part of a system that targets energy harvesting from human body thermal energy to enable long lifetime operation for wearable and biomedical devices.

Original languageBritish English
Title of host publication2015 European Conference on Circuit Theory and Design, ECCTD 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479998777
DOIs
StatePublished - 16 Oct 2015
EventEuropean Conference on Circuit Theory and Design, ECCTD 2015 - Trondheim, Norway
Duration: 24 Aug 201526 Aug 2015

Publication series

Name2015 European Conference on Circuit Theory and Design, ECCTD 2015

Conference

ConferenceEuropean Conference on Circuit Theory and Design, ECCTD 2015
Country/TerritoryNorway
CityTrondheim
Period24/08/1526/08/15

Keywords

  • Energy harvesting
  • thermoelectric generator
  • ultra-low power systems
  • wearable body electronics
  • wireless sensor nodes
  • zero current switching

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