A 2.6 $\mu$W Monolithic CMOS Photoplethysmographic (PPG) Sensor Operating With 2 $\mu$W LED Power for Continuous Health Monitoring
A 2.6 $\mu$W Monolithic CMOS Photoplethysmographic (PPG) Sensor Operating With 2 $\mu$W LED Power for Continuous Health Monitoring
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DOI：
10.1109/tbcas.2019.2944393
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发表时间：
2019-12-01
影响因子：
5.1
通讯作者：
Enz, Christian
中科院分区：
文献类型：
--
作者：
Caizzone, Antonino;Boukhayma, Assim;Enz, Christian
光电体积描记术（PPG）可实现可穿戴的生命体征监测。然而，它仍然受到LED驱动电流的几mA的限制。我们提出了一个PPG传感器集成的阵列专用的引脚光电二极管（PPD）与完整的读出链集成在一个0.18 $\mu$m CMOS图像传感器（CIS）的过程。该传感器具有每PPD 0.68 e-rms的总输入参考噪声，与输入光无关，并在1.38 bpm心率平均误差下实现4.6 $\mu$W的总功耗，包括2 $\mu$W的LED功率。
Photoplethysmography (PPG) enables wearable vitals monitoring. Nevertheless, it is still limited by the few mA of the LEDs driving current. We present a PPG sensor integrating an array of dedicated pinned-photodiodes (PPD) with a full readout chain integrated in a 0.18 $\mu$m CMOS Image Sensor (CIS) process. The sensor features a total input referred noise of 0.68 e-rms per PPD, independently of the input light, and achieves a 4.6 $\mu$W total power consumption, including the 2 $\mu$W LED power, at 1.38 bpm heart rate average error.