Novel charge pump converter with Tunnel FET devices for ultra-low power energy harvesting sources

David Cavalheiro, Francesc Moll, Stanimir Valtchev

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

2 Citations (Scopus)

Abstract

Compared to conventional technologies, the superior electrical characteristics of III-V Tunnel FET (TFET) devices can highly improve the process of energy harvesting conversion at ultra-low input voltage operation (sub-0.25V). In order to extend the input voltage/power range of operation in conventional charge pump topologies with TFET devices, it is of the major importance to reduce the band-to-band tunneling current when the transistor is under reverse bias conditions. This paper proposes a new charge pump topology with TFET devices that attenuate the reverse losses, thus improving the power conversion efficiency (PCE) in a broader range of input voltage values and output loads. It is shown by simulations that compared with the conventional gate cross-coupled charge pump and considering an input voltage of 640 mV, the proposed topology reduces the reverse losses from 19 % to 1 %, for an output current of 10 μA. For this case, the PCE increased from 63 % to 83 %.

Original languageEnglish
Title of host publicationIEEE 58th International Midwest Symposium on Circuits and Systems
Subtitle of host publicationClimbing to New Heights, MWSCAS 2015 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Volume2015-September
ISBN (Electronic)978-1-4673-6557-4
DOIs
Publication statusPublished - 28 Sep 2015
Event58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 - Fort Collins, United States
Duration: 2 Aug 20155 Aug 2015

Conference

Conference58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015
CountryUnited States
CityFort Collins
Period2/08/155/08/15

Keywords

  • Charge Pump
  • Energy Harvesting
  • Switched-Capacitor
  • Thermo-generator
  • Tunnel FET
  • Ultra-Low Power

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  • Cite this

    Cavalheiro, D., Moll, F., & Valtchev, S. (2015). Novel charge pump converter with Tunnel FET devices for ultra-low power energy harvesting sources. In IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings (Vol. 2015-September). [7282034] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSCAS.2015.7282034