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Updated: Feb 26, 2026
Optogenetic Stimulation of the Auditory Nerve
Published on: October 8, 2014
An Auditory Nerve Stimulation Chip with Integrated AFE, Sound Processing, and Power Management for Fully Implantable
Nijad Anabtawi1, Sabrina Freeman2, Rony Ferzli3
1Intel Corporation, Chandler, AZ and the Department of Electrical Engineering, Arizona State University, Tempe, AZ.
Abstract:
This paper presents a system on chip for a fully implantable cochlear implant. It includes acoustic sensor front-end, 4-channel digital sound processing and auditory nerve stimulation circuitry. It also features a digital, switched mode, single inductor dual output power supply that generates two regulated voltages; 0.4 V used to supply on-chip digital blocks and 0.9 V to supply analog blocks and charge the battery when an external RF source is detected. All passives are integrated on-chip including the inductor. The system was implemented in 14nm CMOS and validated with post layout simulations.
