A Varactor-Based All-Digital Multi-Phase PLL with Random-Sampling Spur Suppression Techniques. - Chia-Wen Chang; Kai-Yu Lo; Hossameldin A. Ibrahim; Ming-Chiuan Su; Yuan-Hua Chu; Shyh-Jye Jou (IEICE Trans. Electron., 2016)

A Low-Jitter ADPLL with Adaptive High-Order Loop Filter and Fine Grain Varactor Based DCO. - Chia-Chen Chang; Yu-Tung Chin; Hossameldin A. Ibrahim; Kang-Yu Chang; Shyh-Jye Jou (ISCAS, 2021)