摘要
本研究针对视神经假体的参数需求设计了电极驱动电路,采用电荷平衡的双向电流作用于微电极来刺激视神经以产生视觉感受。基于TSMC 0.35μm BCD工艺,使用HSPICE软件对设计的电路模块进行了仿真,使用Modelsim和FPGA对设计的数字控制电路进行了仿真及验证。结果表明,所设计电路可以产生64通道的双向刺激电流,电流大小0～1 022μA,分512级可调,脉冲持续时间0～400μs。
With the aim of parameters demand of the optic nerve prosthesis,the paper designs the electrode driving circuit by using biphasic current to microelectrodes to stimulate the optic nerve and produce visual experience.The designed circuits are stimulated with HSPICE software based on TSMC 0.35 μm BCD process,and the digital control circuit is simulated and verified with Modelsim and FPGA.The experimental results show that electrode driving circuit can generate the 64-channel biphasic stimulus current with an amplitude between 0 μA and 1 022 μA,dividing 512 grades adjustable and pulse lasting time being 0~400 μs.
出处
《西安理工大学学报》
CAS
北大核心
2012年第3期284-288,共5页
Journal of Xi'an University of Technology
基金
国家自然科学基金资助项目(61102017)
西安市科技计划基金资助项目(CXY1129(5))
关键词
视觉假体
微电流刺激
数模混合
visual prosthesis
micro-current stimulation
mixed analog-digital circuit
