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You can find several papers for all-digital DLLs in the follwoing website.) L/ E% ]" T) `7 b- L
Good luck. 1 r8 O" v4 k; O/ |0 L) u8 [7 [- x' V; w8 g. e3 Z2 F6 ?+ R http://www2.ee.ntu.edu.tw/~ecl/Professor/Professorpub.htm