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Micro-stimulator circuitry design for visual prosthesis based on optic nerve stimulation in artificial vision

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4 Author(s)
Jia Wang ; Inst. for Laser Medicine & Bio-Photonics, Shanghai Jiao Tong Univ. ; Ying Zhao ; Xinyu Chai ; Qiushi Ren

A micro-stimulator circuitry designed for visual prosthesis based on optic nerve stimulation is presented in this paper. This micro-stimulator is capable of providing a wide range of biphasic current pulses with an amplitude from several muA up to 4 mA, a pulse width from 20 musec up to over four hundred musec, and a pulse frequency up to over three hundred Hz. The micro current pulses transmitting to the penetrating multi-electrode-arrays will stimulate optic nerve to elicit phosphenes within visual field. The performances of the proposed micro-stimulator circuitry were studied using the PSPICE program. The simulation results verified the circuit performances are agreed with the expected values

Published in:

2006 8th international Conference on Signal Processing  (Volume:4 )

Date of Conference:

16-20 Nov. 2006