A BJT-based temperature sensor using two sub-OPAMPs Chopper ripple reduction technique with inaccuracy of ±0.25 °C (3σ) from -45 °C to 85 °C. - Qiansong Guo; Xia Ma; Zhiming Xiao; Yi Hu; Jingbin Feng; Meiyu Wang; Weibo Hu (Microelectron. J., 2022)