A single chip PPG sensor with enhanced IR sensitivity for low power and small size. - Jungwook Lim; Jihun Kim; Long Yan; Hyunpil Noh; Seungki Jung; Doosik Seol; Junghyung Pyo; Taesub Jung; Jungbin Yun; Dukseo Park; Howoo Park; Kyungho Lee; et al. (Imaging Sensors and Systems, 2021)