Title :
Electronic design of a cochlear implant for multichannel high-rate pulsatile stimulation strategies
Author :
Zierhofer, Clemens M. ; Hochmair-Desoyer, Ingeborg J. ; Hochmair, Erwin S.
Author_Institution :
Inst. of Experimental Phys., Innsbruck Univ., Austria
fDate :
3/1/1995 12:00:00 AM
Abstract :
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
Keywords :
biomedical electronics; hearing aids; 1.5 muA to 1.5 mA; 8-channel cochlear implant; cochlear implant electronic design; data rate; data synchronization; implant supply voltage; monopolar intracochlear multielectrode array; multichannel high-rate pulsatile stimulation strategies; output capacitors; single mixed analog/digital CMOS-ASIC; single rf-channel; stimulus generation; symmetric biphasic current pulses; transcutaneously transferred data; transcutaneously transferred power; Acoustic pulses; Auditory implants; Cochlear implants; Computational Intelligence Society; Energy consumption; Frequency; Pulse generation; Speech processing; Speech recognition; Voltage;
Journal_Title :
Rehabilitation Engineering, IEEE Transactions on
