Design of an Analog Front End for a Bio-Inspired Auditory Sensor of a Novel Totally Implantable Cochlear Implant

作者：Park Jeong Hoan; Kim Jin Ho; Song Yoon Kyu^*; Jung Youngdo; Hur Shin; Kim Wandoo; Kim Sung June

来源：Sensors and Materials, 2013, 25(8): 553-565.

• cochlear implant
• totally implantable cochlear implant
• artificial basilar membrane
• piezoelectric sensor
• low-noise low-power analog front end
• biosensor

In this paper, we present a low-power and low-noise analog front end for a totally implantable cochlear implant using a bio-inspired auditory sensor. We used the "g(m) of I-D" method to design an analog front end as the interface to an artificial basilar membrane with reduced flicker and thermal noises and low power consumption. We fabricated an Application-Specific Integrated Circuit (ASIC) chip with an analog front end using a 0.35 mu m high-voltage CMOS process, showing a measured gain range of 40.35-62.94 dB with an input-referred noise of 5.32 mu Vrms at a power consumption of 272 mu W per channel. As proof of concept demonstration, we used an analog front end with an artificial basilar membrane sensor, exhibiting an audio signal transduction suitable for a biomimetic artificial cochlear implant.

• 出版日期2013