S&M Young Researcher Paper Award 2020
Recipients: Ding Jiao, Zao Ni, Jiachou Wang, and Xinxin Li [Winner's comments]
Paper: High Fill Factor Array of Piezoelectric Micromachined
Ultrasonic Transducers with Large Quality Factor

S&M Young Researcher Paper Award 2021
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Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Bandwidth Broadening of MEMS Vibration Energy Harvesters by Voltage-boost Rectifier Circuit [PDF]

Yukiya Tohyama, Hiroaki Honma, Hiroshi Toshiyoshi, and Daisuke Yamane

(Received July 2, 2021; Accepted October 29, 2021)

Keywords: MEMS, vibration, energy harvester, voltage boost, rectifier

This paper presents a methodology to extend the working bandwidth of vibration energy harvesters (VEHs) by using a voltage-boost rectifier (VBR) circuit. The VBR circuit rectifies small ac voltages of MEMS VEHs and boosts them to a dc voltage sufficient for the operation of the subsequent circuitry. The proposed system using the VBR circuit can work regardless of the VEH type. Also, the VBR circuit can be monolithically integrated with CMOS LSI without using other external components. The developed VBR circuit is experimentally evaluated using a MEMS VEH and successfully delivers boosted dc voltages even when the input ac amplitude is below 0.4 V in the frequency range (<1 kHz) of environmental vibrations. We confirm that the working bandwidth can be increased by employing the VBR circuit compared with the use of conventional diode rectification.

Corresponding author: Yukiya Tohyama, Daisuke Yamane




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