4.3 A programmable sub-nanosecond time-gated 4-tap lock-in pixel CMOS image sensor for real-time fluorescence lifetime imaging microscopy. - Min-Woong Seo; Yuya Shirakawa; Yuriko Masuda; Yoshimasa Kawata; Keiichiro Kagawa; Keita Yasutomi; Shoji Kawahito (ISSCC, 2017)