A Vestibular Prosthesis With Highly-Isolated Parallel Multichannel Stimulation

作者：Jiang Dai^*; Cirmirakis Dominik; Demosthenous Andreas

来源：IEEE Transactions on Biomedical Circuits and Systems, 2015, 9(1): 124-137.

DOI：10.1109/TBCAS.2014.2323310

• Application specific integrated circuit (ASIC)
• crosstalk
• implanted device
• parallel stimulation
• power isolation
• stimulation control
• vestibular evoked potential (VEP) recording
• vestibular prosthesis

This paper presents an implantable vestibular stimulation system capable of providing high flexibility independent parallel stimulation to the semicircular canals in the inner ear for restoring three-dimensional sensation of head movements. To minimize channel interaction during parallel stimulation, the system is implemented with a power isolation method for crosstalk reduction. Experimental results demonstrate that, with this method, electrodes for different stimulation channels located in close proximity (<2 mm) can deliver current pulses simultaneously with minimum inter-channel crosstalk. The design features a memory-based scheme that manages stimulation to the three canals in parallel. A vestibular evoked potential (VEP) recording unit is included for closed-loop adaptive stimulation control. The main components of the prototype vestibular prosthesis are three ASICs, all implemented in a 0.6-mu m high-voltage CMOS technology. The measured performance was verified using vestibular electrodes in vitro.

• 出版日期2015-2