An Implantable Closed-Loop Vestibular Prosthesis

This paper presents an implantable closed-loop vestibular prosthesis for restoring three-dimensional (3-D) balance sensation. The prosthesis consists of an external part and an implantable part. The external part collects the head motion and controls the stimulation from the implantable part accordingly. In the implantable part, advanced stimulation management is used to control independent parallel stimulation on the three semicircular canals. Real-time neural recording function is also included in the design. The implantable part includes three ASICs, which were fabricated in a 0.6-μm HV CMOS technology. Measured results are presented to demonstrate the operation of the circuit.