宽电源电压范围的人工视网膜电路  

A power supply-independent artificial retinal circuit

作　　者：孙康明[1,2] 袁祥辉[1] 孟丽娅[1] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044 [2]重庆工商职业学院,重庆400052

出　　处：《电路与系统学报》2009年第3期67-70,共4页Journal of Circuits and Systems

基　　金：国家自然科学基金资助项目(30470469);国家自然科学基金资助项目(60702007)的资助

摘　　要：针对人工视网膜电路无线能源供应和视网膜电刺激信号的特殊要求,分析了现有几种视网膜电路存在的不足,提出了一种结构新颖的人工视网膜电路。新电路引入了电流源,极大降低了电源电压的波动对电路性能的影响。用标准的0.6μm CMOS工艺对新电路进行了模拟,结果表明,新电路在较宽的电源电压范围内都能保持相当好的动态特性,因此更适合用于视网膜下植入。This paper presents a novel artificial retinal circuit, which is an effective solution to recover visual capabilities for patients of retinal pathologies. A current source without resistor is analyzed and used in the design of the artificial retinal circuit. The proposed circuit can keep steady performance in a wide range of power supply and so it can be implemented by RF power induction. The simulated results in a standard 0.6μm CMOS process show the circuit meets the requirements of retinal electrical stimulation well and demonstrate the potential for retinal prosthesis.

关 键 词：人工视网膜 电流源 振荡像元 脉冲宽度 动态范围 

分 类 号：TN36[电子电信—物理电子学]