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You can find several papers for all-digital DLLs in the follwoing website. s5 R- L0 \9 h$ p8 i& V7 B: {Good luck.1 |4 T, Q, B8 S/ q7 i, F/ O3 j
% L$ Y% j$ q/ m c- G% L# T* ` http://www2.ee.ntu.edu.tw/~ecl/Professor/Professorpub.htm