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A 2.5-Gb/s clock and data recovery IC with tunable jitter characteristics for use in LANs and WANs

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4 Author(s)
K. Kishine ; NTT Network Innovation Labs., Kanagawa, Japan ; N. Ishihara ; K. Takiguchi ; H. Ichino

A 2.5-Gb/s monolithic clock and data recovery (CDR) IC using the phase-locked loop (PLL) technique is fabricated using Si bipolar technology. The output jitter characteristics of the CDR can be controlled by designing the loop-gain design and by using the switched-filter PLL technique. The CDR IC can be used in local-area networks (LANs) and in long-haul backbone networks or wide-area networks (WANs). Its power consumption is only 0.4 W. For LANs, the jitter generation of the CDR when the loop gain is optimized is 1.2 ps (0.003 UI). The jitter characteristics of the CDR optimized for WANs meet all three types of STM-I6 jitter specifications given in ITU-T Recommendation G.958. This is the first report on a CDR that can be used for both LAN's and WAN's. This paper also describes the design method of the jitter characteristics of the CDR for LANs and WANs

Published in:

IEEE Journal of Solid-State Circuits  (Volume:34 ,  Issue: 6 )