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Burst mode packet receiver using a second order DLL

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5 Author(s)
Haechang Lee ; Center for Integrated Syst., Stanford Univ., CA, USA ; Chi Ho Yue ; S. Palermo ; K. W. Mai
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This paper describes a CDR that can be used to receive optically switched packets. Rather than using fast phase acquisition to lock onto each packet, it uses a second order delay locked loop to acquire both the frequency and phase of each source to predict future bit transitions. A 0.25 μm CMOS prototype can track frequency offsets of 100ppm to better than 0.1 ppm and can retain lock on 10Kbit 3.125Gbps packets that occur once every 2.4Mbits.

Published in:

VLSI Circuits, 2004. Digest of Technical Papers. 2004 Symposium on

Date of Conference:

17-19 June 2004