Design of a Bone-Guided Cochlear Implant Microsystem With Monopolar Biphasic Mul

Abstract

A CMOS bone-guided cochlear implant (BGCI) microsystem is proposed and verified. In the implanted Sys- tem on Chip (SoC) of the proposed BGCI, the evoked com- pound action potential (ECAP) acquisition and electrode–tissue impedance measurement (EAEIM) circuit is integrated to mea- sure both ECAP and electrode–tissue impedance for clinical diagnoses. Both positive-/negative-voltage charge pumps and monopolar biphasic constant-current stimulation (CCS) stimu- lator are designed on-chip to realize m