2017 Volume 55Annual Issue 5PM-Abstract Pages 464
Pulse-rate (PR) has become one of the most important indexes for health monitoring. It is well known that photoplethysmography (PPG) is widely used for PR monitoring and uses relationships between light reflection/absorption in blood vessel and blood volume [1,2]. In this work, we integrated a LED driver circuit, a 600×600μm2 Photodiode (PD), and signal processing front-end circuits including a I/V converter, LNA(20-40dB), LPF, 12bit SAR-ADC into one chip to realize a wearable and comfortable PPG sensor system placed on fingernails. We designed and fabricated the above circuits using a 180-nm-CMOS technology. We confirmed that all circuits worked correctly, and we will present the detailed results in a conference. [1] Kohei Ishii et. al., 3T6-2-9, 55th Annual Conf. JSMBE, 2016. [2] Yu Sun et. al., IEEE Trans. on Biomed. Eng., Vol. 63, No. 3, 2016.
