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Electronic design of a cochlear implant for multichannel high-rate pulsatile stimulation strategies

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3 Author(s)
Zierhofer, C.M. ; Inst. of Experimental Phys., Innsbruck Univ., Austria ; Hochmair-Desoyer, I.J. ; Hochmair, Erwin S.

A new electronic design for an eight-channel cochlear implant for high-rate pulsatile stimulation strategies is presented. Symmetric biphasic current pulses can be generated up to a maximum pulse repetition rate of about 12 kpulses/s. The stimulation pulse amplitude can be selected within the range of 1.5 μA-1.5 mA. The implant contains a single mixed analog/digital CMOS-ASIC for data synchronization and stimulus generation. Stimulation signals are applied via a monopolar intracochlear multielectrode array. Output capacitors are employed for safety reasons. A back-telemetry system for measuring electrode voltages and the implant supply voltage is incorporated. Data and power are transcutaneously transferred to the implant, using a single rf-channel. The overall data rate is 400 kb/s

Published in:

Rehabilitation Engineering, IEEE Transactions on  (Volume:3 ,  Issue: 1 )

Date of Publication:

Mar 1995

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