Print Email Facebook Twitter A Monolithic Photoplethysmogram (PPG) Sensor Title A Monolithic Photoplethysmogram (PPG) Sensor Author MOU, Jixuan (TU Delft Electrical Engineering, Mathematics and Computer Science) Contributor Pertijs, M.A.P. (mentor) Jiang, Hui (mentor) Degree granting institution Delft University of Technology Corporate name Delft University of Technology Programme Electrical Engineering | Microelectronics Date 2022-08-30 Abstract A photoplethysmogram (PPG) is an important optically-obtained bio-signal that enables convenient daily monitoring of heart rate and oxygen saturation (SpO2). Most state-of-the-art PPG sensing systems require an off-chip photodiode, and the photodiode's output parasitic capacitance limits the power-noise trade offs. The objective of this project is to implement a monolithic low-power PPG sensor for heart-rate detection. A novel sensing system has been developed, which has arrays of photogate imagers as front-ends and a compact successive approximation register analog-to-digital converter serving as the readout circuit. The readout power consumption is 0.64 µW at a sampling rate of 40 Hz. The minimum required LED power consumption is predicted to be 3 µW according to the post-layout simulation. The die area is 6.05 mm2 including the pads. Compared with the prior art, the readout power consumption is reduced by four times and the die area is reduced by 3 times. The chip was submitted for fabrication in June in TSMC180nm. Subject PPG sensor, monolithic, photogate imager, SAR ADC and low power To reference this document use: http://resolver.tudelft.nl/uuid:58c0d829-55cc-4fbf-a221-0ff73261be6e Embargo date 2023-08-31 Part of collection Student theses Document type master thesis Rights © 2022 Jixuan MOU Files PDF Thesis_Jixuan_Final_A_mon ... sensor.pdf 6.14 MB Close viewer /islandora/object/uuid:58c0d829-55cc-4fbf-a221-0ff73261be6e/datastream/OBJ/view