A 12-b 40-MS/s Calibration-Free SAR ADC. - Hsu, Chung-Wei; Chang, Soon-Jyh; Huang, Chun-Po; Chang, Li-Jen; Shyu, Ya-Ting; Hou, Chih-Huei; Tseng, Hwa-An; Kung, Chih-Yuan; Hu, Huan-Jui (IEEE Transactions on Circuits & Systems. Part I: Regular Papers, 2018)