A 9.03 μW Low Noise Highly Tunable Analog Front-End for Fully Implantable Cochlear Prosthesis

Ozbek B., Külah H.

2022 IEEE Biomedical Circuits and Systems Conference, BioCAS 2022, Taipei, Tayvan, 13 - 15 Ekim 2022, ss.349-353 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/biocas54905.2022.9948682
  • Basıldığı Şehir: Taipei
  • Basıldığı Ülke: Tayvan
  • Sayfa Sayıları: ss.349-353
  • Anahtar Kelimeler: Analog front-end, auditory signal processing, fully implantable cochlear implant, low power consumption
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

© 2022 IEEE.This paper presents a low noise, low power and highly programmable analog front-end that can interface with an implantable acoustic sensor of a 12-channel fully implantable cochlear implant. Capable of processing outputs from a sensor higher than 20 μVrms as in the speech processors of conventional cochlear implants, the system mimics the filtering in the cochlea with 12 channels (85-6500 Hz) while consuming only 9.03 μW which is one of the lowest power consumption among the analog front-ends for the cochlear implants to the best of our knowledge. Although the processing is realized in the analog domain, the system is highly reconfigurable in terms of center frequency, bandwidth and signal amplitude of the channels so that the system becomes compatible with different sensors and maximizes the hearing for each patient. The system was designed in TSMC 180-nm CMOS technology on an active area of 2.4 mm2 and the operation was verified by simulation results.