A Low-Power Time-to-Digital Converter for the CMS Endcap Timing Layer (ETL) Upgrade. - Wei Zhang; Hanhan Sun; Christopher Edwards; Datao Gong; Xing Huang; Chonghan Liu; Tiankuan Liu; Tiehui Liu 001; Jamieson Olsen; Quan Sun; Xiangming Sun; Jinyuan Wu; et al. (CoRR, 2020)