Event Driven Time-logging System based on Continuous Operation of Real Time Clock towards Perpetual Electronics

S. Yamada, H. Toshiyoshi

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper presents a novel time logging system using a real time clock (RTC) powered by a vibrational energy harvester to record the time of events when piezoelectric PVDF film as an event-driven sensor is activated. The power-management circuit normally remains in the sleep mode to cut power supply to the micro-processor and the ferroelectric random access memory. On the other hand, the RTC alone is powered by a battery to keep the time by seamless operation, which lowers the standby power consumption as small as 231 nW. As the PVDF film generates power, the developed power management circuit can supply load current upwards of 8 mA at 3.3 Vdc for external circuit to record the time of events with the energy consumption of 467 μJ.

Original languageEnglish
Article number012045
JournalJournal of Physics: Conference Series
Volume1407
Issue number1
DOIs
Publication statusPublished - 2019 Dec 4
Externally publishedYes
Event18th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications, PowerMEMS 2018 - Daytona Beach, United States
Duration: 2018 Dec 42018 Dec 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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