A Fully-Implantable Mems-Based Autonomous Cochlear Implant

Külah H., Ulusah H., Chamanian S., Batu A., Uğur M. B., Yüksel M. B., ...More

35th IEEE International Conference on Micro Electro Mechanical Systems Conference, MEMS 2022, Tokyo, Japan, 9 - 13 January 2022, vol.2022-January, pp.396-399 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 2022-January
  • Doi Number: 10.1109/mems51670.2022.9699689
  • City: Tokyo
  • Country: Japan
  • Page Numbers: pp.396-399
  • Keywords: Fully Implantable Cochlear Implant, MEMS, Acoustic Transducer, Acoustic Energy Harvester, Low Power Electronics
  • Middle East Technical University Affiliated: Yes

Abstract

© 2022 IEEE.This paper reports a fully implantable, MEMS-based, low-power, energy harvesting, next generation cochlear implant (CI). The implant includes multi-frequency piezoelectric transducers for sound detection and energy harvesting, rectification and signal conditioning electronics, and RF coil for fitting and external powering. These units have outstanding performances: multi-channel transducer can generate 50.7 mVpp (under 100 dB SPL) and recover the daily sound speech signals; signal conditioning IC consumes outstandingly low power (<500 W) while converting outputs signals of the transducer to biphasic pulses; piezoelectric energy harvester has the highest power density (1.5 × 10-3 W/cm3) with generated 16.25 W under 120 dB-A sound input; energy harvester IC, provides up to 500% more power compared to an ideal full-bridge rectifier.