All-Digital Time-Domain Smart Temperature Sensor With an Inter-Batch Inaccuracy of -0.7 °C - +0.6 °C After One-Point Calibration. - Poki Chen; Shou-Chih Chen; You-Sheng Shen; You-Jyun Peng (IEEE Trans. Circuits Syst. I Regul. Pap., 2011)