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All Digital DLL with Three Phase Tuning Stages

Jin-Ho CHOI, Jin-Ku KANG

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Summary :

This paper describes an all-digital DLL (Delay Locked Loop) circuit with a high phase resolution. The proposed architecture is based on three-stage phase tuning blocks for coarse, fine and ultra fine phase control. Each block has a phase detector, a phase selection block and a delay line, respectively. It was simulated in a 0.35 µm CMOS technology under 3.3 V power supply. The simulation result shows the maximum phase error can be reduced to 13-42 ps with the operating range of 250 MHz to 800 MHz.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E87-A No.6 pp.1305-1309
Publication Date
2004/06/01
Publicized
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Type of Manuscript
Special Section PAPER (Special Section on Papers Selected from 2003 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2003))
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