19.11 A 13GHz Charge-Pump PLL Achieving 15.8fsrms Integrated Jitter and -98.5dBc Reference Spur. - Depeng Sun; Feng Bu; Qixian Ye; Shijie Li; Yuan Gao; Bowen Wang; Hao Xu 005; Na Yan; Shubin Liu; Zhangming Zhu (ISSCC, 2025)