A 0.64μm 4-Photodiode 1.28μm 50Mpixel CMOS Image Sensor with 0.98e- Temporal Noise and 20Ke- Full-Well Capacity Employing Quarter-Ring Source-Follower. - Hyuncheol Kim; Yun Hyeok Kim; Sanghyuck Moon; Hwanwoong Kim; Byeongjun Yoo; Jueun Park; Seyoung Kim; June-Mo Koo; Sewon Seo; Hye Ji Shin; Younghwan Choi; Jinwoo Kim; et al. (ISSCC, 2023)