Impact-based piezoelectric energy harvester as a power source for a neural activity monitoring circuit

Sunhee Kim, Suna Ju, Chang Hyeon Ji

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Recently, energy harvesters have been studied as a power source for implantable biomedical devices. However, practical applications of energy harvesters to implantable medical devices are very rare because energy harvesters and implantable medical devices have been studied separately. In this paper, we present a neural activity monitor circuit, which is one of implantable medical devices, solely powered by an energy harvester. The system consists of an impact-based piezoelectric energy harvester, a power transfer circuit, and a neural signal monitoring circuit. Reliability of the system was verified by comparing it with a system powered by a DC power supply. It was found that the harvester provided sufficient energy to the system for reliable neural activity monitoring. We expect that presented results may work as a reference for designing harvesters and power transfer circuits together with implantable medical devices in an environment of a human body.

Original languageEnglish
Pages (from-to)51-62
Number of pages12
JournalInternational Journal of Grid and Distributed Computing
Issue number3
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 SERSC Australia.


  • Biomedical monitoring
  • Energy harvesting
  • Equivalent circuits
  • Vibration energy


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