[23p-A105-1~13] 12.7 Biomedical Engineering and Biochips

△ [23p-A105-11] Development of Background Noise Cancellation Circuit with Switched Capacitor CDS for Trans-Nail Pulse Wave Measurement System

〇Bunta Inoue¹, Yaogan Liang¹, Bang Du¹, Kouhei Nakamura¹, Shengwei Wang¹, Aruga Yuta¹, Hisashi Kino², Takafumi Fukushima², Koji Kiyoyama³, Tetsu Tanaka^1,2 (1.Grad. Sch. of Eng., Tohoku Univ., 2.Grad. Sch. of Biomedical Eng., Tohoku Univ., 3.Nagasaki Inst. of Applied Science)

Keywords:Background noise cancel, Photoplethysmography, Trans-Nail

We have proposed a background noise cancellation (BNC) circuit based on a switched-capacitor correlated double sampling system for photoplethysmography. When converting the current from the photodiode to voltage, ambient light noise and motion artifacts of movement can be removed. the BNC circuit consists of capacitors and switches that store signals and noise and can improve the quality of daily health monitoring.