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A 13.2b optical proximity sensor system with 130klx ambient light rejection capable of heart rate and blood oximetry monitoring

机译:具有130klx环境光抑制能力的13.2b光学接近传感器系统,能够监测心率和血氧饱和度

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摘要

A system for measuring optical proximity based on reflection of modulated light is presented. Its novel input stage topology comprising an AC coupled TIA and a two stage DC rejection circuit based on a synthesized inductive impedance, provides readouts with a resolution better than 13.2 ENOB. This allows the sensor system to be used without modifications also for heart rate and blood oximetry monitoring.
机译:提出了一种用于基于调制光的反射来测量光学接近度的系统。其新颖的输入级拓扑包括一个交流耦合的TIA和一个基于合成电感性阻抗的两级DC抑制电路,可提供分辨率优于13.2 ENOB的读数。这允许传感器系统无需修改即可用于心率和血氧饱和度监测。

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