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

David Cavalheiro; Francesc Moll; Stanimir Valtchev

doi:10.1109/MWSCAS.2015.7282034

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 proceeding › Conference contribution › peer-review

3 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 language	English
Title of host publication	IEEE 58th International Midwest Symposium on Circuits and Systems
Subtitle of host publication	Climbing to New Heights, MWSCAS 2015 - Conference Proceedings
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Volume	2015-September
ISBN (Electronic)	978-1-4673-6557-4
DOIs	https://doi.org/10.1109/MWSCAS.2015.7282034
Publication status	Published - 28 Sept 2015
Event	58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 - Fort Collins, United States Duration: 2 Aug 2015 → 5 Aug 2015

Conference

Conference	58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015
Country/Territory	United States
City	Fort Collins
Period	2/08/15 → 5/08/15

Keywords

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

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10.1109/MWSCAS.2015.7282034

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 (IEEE). https://doi.org/10.1109/MWSCAS.2015.7282034

Cavalheiro, David ; Moll, Francesc ; Valtchev, Stanimir. / Novel charge pump converter with Tunnel FET devices for ultra-low power energy harvesting sources. IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings. Vol. 2015-September Institute of Electrical and Electronics Engineers (IEEE), 2015.

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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 %.",

keywords = "Charge Pump, Energy Harvesting, Switched-Capacitor, Thermo-generator, Tunnel FET, Ultra-Low Power",

author = "David Cavalheiro and Francesc Moll and Stanimir Valtchev",

note = "sem pdf conforme despacho. FCT (Fundacao para a Ciencia e a Tecnologia) and Spanish Ministry of Economy (MINECO) and ERDF funds through project TEC2013-45638-C3-2-R (Maragda).; 58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 ; Conference date: 02-08-2015 Through 05-08-2015",

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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 (IEEE), 58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015, Fort Collins, United States, 2/08/15. https://doi.org/10.1109/MWSCAS.2015.7282034

Novel charge pump converter with Tunnel FET devices for ultra-low power energy harvesting sources. / Cavalheiro, David; Moll, Francesc; Valtchev, Stanimir.
IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings. Vol. 2015-September Institute of Electrical and Electronics Engineers (IEEE), 2015. 7282034.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Moll, Francesc

AU - Valtchev, Stanimir

N1 - sem pdf conforme despacho. FCT (Fundacao para a Ciencia e a Tecnologia) and Spanish Ministry of Economy (MINECO) and ERDF funds through project TEC2013-45638-C3-2-R (Maragda).

PY - 2015/9/28

Y1 - 2015/9/28

N2 - 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 %.

AB - 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 %.

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KW - Switched-Capacitor

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PB - Institute of Electrical and Electronics Engineers (IEEE)

T2 - 58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015

Y2 - 2 August 2015 through 5 August 2015

ER -

Cavalheiro D, Moll F, Valtchev S. 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. Institute of Electrical and Electronics Engineers (IEEE). 2015. 7282034 doi: 10.1109/MWSCAS.2015.7282034

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

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Keywords

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