| 一种血氧饱和度检测芯片的低功耗设计新方法 |
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| 引用本文： | 程亚宇,李严,张元亭.一种血氧饱和度检测芯片的低功耗设计新方法[J].微电子学,2011,41(6). |
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| 作者姓名： | 程亚宇 李严 张元亭 |
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| 作者单位： | 1. 中国科学院健康信息学重点实验室,广东深圳518055;中国科学院深圳先进技术研究院生物医学与健康T程研究所,广东深圳518055
2. 中国科学院健康信息学重点实验室,广东深圳518055;中国科学院深圳先进技术研究院生物医学与健康T程研究所,广东深圳518055;香港中文大学生物医学工程联合研究中心,香港 |
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| 基金项目： | 国家重点基础研究发展(973)计划基金资助项目(2010CB732606); 广东省引进创新科研团队“低成本健康技术创新团队”资助项目 |
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| 摘 要： | 提出了一种血氧饱和度检测集成电路的低功耗设计新方法,采用先电流滤波再对数放大的前端处理思路简化电路结构、降低功耗,在相同检测条件下,使LED驱动脉冲电流占空比从原来的3％降为0.3％甚至更低,使占检测系统功耗主要部分的LED模块功耗降为原来的1/10甚至更低.检测电路包括电流滤波器、对数跨阻放大器、电流模比值运算电路.仿真结果表明,在1.8V电源电压下,输入电流为2.7～15 μA时,芯片总消耗电流仅为22～80 μA.
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| 关 键 词： | 血氧饱和度 集成电路 低功耗 电流模 |
A New Design Methodology of Low Power IC for Blood OxygenSaturation Measurement |
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| CHENG Yayu
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LI Yan
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ZHANG Yuanting.A New Design Methodology of Low Power IC for Blood OxygenSaturation Measurement[J].Microelectronics,2011,41(6). |
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| Authors: | CHENG Yayu LI Yan ZHANG Yuanting |
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| Affiliation: | CHENG Yayu1,2,LI Yan1,ZHANG Yuanting1,3(1.Key Lab of Health Informatics,The Chinese Academy of Sciences,Shenzhen,Guangdong 518055,P.R.China,2.Institute of Biomedical and Health Engineering,Shenzhen Institute of Advanced Technology,3.Joint Research Centre for Biomedical Engineering,Dept.of Elec.Engineer.,The Chinese University of Hong Kong,Hong Kong,P.R.China) |
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| Abstract: | A new design method of low power IC for blood oxygen saturation(SpO2) measurements was proposed,in which a current mode filter was followed by a logarithmic amplifier to reduce power consumption.With this technique,duty cycle of LED driven pulse could be reduced to 0.3% from 3%,or even less,under same detecting conditions,which resulted in a reduced LED power down to 1/10 of the former design.The proposed circuit contained a current-mode filter,a logarithmic transimpedance amplifier and a current-mode ratio... |
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| Keywords: | Blood oxygen saturation Integrated circuit Low power Current mode |
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