High Resolution Multi-frequency Digital Phase Locked Loop. - Avner Efendovich; Yachin Afek; Coby Sella; Zeev Bikowsky (ISCAS, 1993)

Multifrequency zero-jitter delay-locked loop. - Avner Efendovich; Yachin Afek; Coby Sella; Zeev Bikowsky (IEEE J. Solid State Circuits, 1994)