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A neuro-stimulus chip with telemetry unit for cochlear implant

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4 Author(s)
Mian Dong ; Dept. of Electron. Eng., Tsinghua Univ., Beijing, China ; Chun Zhang ; Zhihua Wang ; Dongmei Li

This paper presents a 16-channel cochlear implant which supports 4 stimulus modes and provides a highest stimulus rate of 15k pulses per second per channel, and dynamic range of 60dB with the 10 bit D/A converter. The device consists of a coil, a rectifier and regulator, and a mixed analog and digital neuro-stimulus ASIC which decodes telemetry command and generates stimulus signals. The chip is fabricated using 1.2μm 2M/2P standard CMOS process and the die size is 3.56 mm × 3.67mm. The circuit is working properly at a telemetry data rate of 500 Kbps in carrier of 10 MHz while the peak power consumption is 35 mW.

Published in:

Biomedical Circuits and Systems, 2004 IEEE International Workshop on

Date of Conference:

1-3 Dec. 2004