A Fully-Implantable Mems-Based Autonomous Cochlear Implant
- Külah, Haluk
- Uluşan, Hasan
- Chamanian, Salar
- Batu, Aykan
- Uğur, M. Birol
- Yüksel, Muhammed Berat
- Yılmaz, Akın M.
- Yiğit, Halil Andaç
- Koyuncuoğlu, Aziz
- Topçu, Özlem
- Soydan, Alper Kaan
DOIAbstract
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 µW) 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 µW under 120 dB-A sound input; en...
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