Design of a micropower current-mode log-domain analog cochlear implant

This paper presents some design concepts and circuits which are the basis o f a very low-power analog cochlear prosthesis in silicon technology. The pr oposed methods use continuous interleaved sampling (CIS) combined with nove l current-mode, micropower analog techniques such as log-domain processing, A tone-controller is presented which will allow bass and treble control tu ned in an analog fashion. Electrical measurements on a silicon implementati on of a single-channel cochlear implant confirm the feasibility of the prop osed approach and its application in multichannel implants.