A 1880μm2 Linear Temperature Sensor with Hybrid Sensing Front-end and Fractional Phase Detection FLL achieving -0.3/+0.28 °C Inaccuracy (3σ) after 1st-order Fitting and 37fJ•K2 Resolution FoM in 28nm CMOS. - Shangjie Wei; Huanfa Sun; Yucong Li; Puxi Tan; Yi Xiong; Yu Su; Chenyao Cao; Yukun He; Xiaoyan Gui (CICC, 2026)