KÜLAH H., Ulusah H., Chamanian S., Batu A., UĞUR M. B., Yuksel M. B., ...More

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

  • Publication Type: Conference Paper / Full Text
  • 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
  • Gazi University Affiliated: Yes


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 mV(pp) (under 100 dB SPL) and recover the daily sound speech signals; signal conditioning IC consumes outstandingly low power (<500 mu W) while converting outputs signals of the transducer to biphasic pulses; piezoelectric energy harvester has the highest power density (1.5 x 10(-3) W/cm(3)) with generated 16.25 mu W under 120 dB-A sound input; energy harvester IC, provides up to 500% more power compared to an ideal full-bridge rectifier.