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A self-powered power conditioning circuit for battery-free energy scavenging applications

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Abstract

A controllable power conditioning circuit is proposed for battery-free energy harvesting applications. The circuit is designed for piezoelectric energy harvester applications and it has only 11 transistors and consist a simple feedback loop and switched capacitor that conditionally allows the power to be applied to the load (circuit to be powered in this case). The area- and power-efficient digital design that does not include any inductors makes the topology easy to apply to any low-power sensor applications. The power conditioning circuit relies on a digital Schmitt trigger that controls the voltage threshold values of the power supply where the load circuit would operate within. The hysteresis (hence the threshold) levels were set to 435 and 710 mV and the overall energy conversion efficiency is around 65 %. The theory of the piezoelectric harvester was also studied.

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Authors and Affiliations

  1. School of Engineering and Technology, Central Michigan University, ET 100, Mount Pleasant, MI, 48859, USA

    Gengchen Liu & Tolga Kaya

  2. Listenloop, 500 7th Ave., New York, NY, 10018, USA

    Rodrigo Fuentes

  3. Ancera, LLC, 21 Business Park, Branford, CT, 06405, USA

    Hur Koser

Authors
  1. Gengchen Liu
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  2. Rodrigo Fuentes
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  3. Hur Koser
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  4. Tolga Kaya
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Correspondence to Tolga Kaya.

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Liu, G., Fuentes, R., Koser, H. et al. A self-powered power conditioning circuit for battery-free energy scavenging applications. Analog Integr Circ Sig Process 83, 203–207 (2015). https://doi.org/10.1007/s10470-015-0530-2

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  • DOI: https://doi.org/10.1007/s10470-015-0530-2

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