Title | ||
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An Active-Copper-Cable with Continuous-Time-Linear-Equalizer IC for 30-AWG 7-meters Reach Interconnect of 400-Gbit/s QSFP-DD |
Abstract | ||
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While a bandwidth for cable interconnects in data centers is getting to be higher, lower power-consumption and cost are required. This paper presents an active-copper-cable (ACC) with a continuous-time-linear-equalizer (CTLE) IC supporting 400-Gbit/s quad-small-form-factor-pluggable double-density (QSFP-DD) multi-source-agreement (MSA). With the cable-specific-linear-equalization, both a pass-characteristic which is compatible with a conventional short passive-copper-cable and a multi-standardization are acquired. Moreover, the heat-dissipation free design for the implementation is achieved by a far-end half-active architecture with a low power repeater. The CTLE-IC fabricated with 180-nm SiGe-BiCMOS process occupies 3.69 x 1.29 mm
<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>
for 4-channels. In experiments, the 0.18-UI eye opening of a 56-Gbit/s/channel 4-level-pulse-amplitude-modulated (PAM4) signal at the 30-AWG 7-m ACC output was achieved with the smallest figure of merit (FOM) of 2.61-pJ/bit/channel. By introducing the QSFP-DD ACC for inner-rack and rack-to-rack connections, power and cost reductions for the next generation 400-Gbit/s interconnects can be achieved. |
Year | DOI | Venue |
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2019 | 10.1109/APCCAS47518.2019.8953149 | 2019 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) |
Keywords | Field | DocType |
active-copper-cable,ACC,SiGe,CTLE,equalizer,data center,cable interconnect,QSFP-DD,400-Gbit/s,PAM4 | Gigabit,Computer science,Communication channel,Electronic engineering,Figure of merit,Bandwidth (signal processing),Repeater,QSFP,Interconnection,Data center | Conference |
ISBN | Citations | PageRank |
978-1-7281-2941-9 | 0 | 0.34 |
References | Authors | |
3 | 5 |
Name | Order | Citations | PageRank |
---|---|---|---|
Koji Maeda | 1 | 0 | 0.34 |
Shoji Yamamoto | 2 | 0 | 0.34 |
Naohiro Kohmu | 3 | 5 | 1.85 |
Kei Nishimura | 4 | 0 | 0.68 |
Izumi Fukasaku | 5 | 24 | 3.36 |