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The amount of data traffic is increasing year by year as the number of data-rich services like cloud services and streaming services are increasing. The number of switch modules between servers should decrease to lower latency, and several servers in each rack should be connected to one switch module with cables in a data centre. Using copper cables to connect racks is attractive in terms of cost...
As processing and network speeds are accelerated to support data-rich services, the bandwidth of backplane interconnects needs to be increased while maintaining the channel length and multi-rate links. However, channel losses and impedance discontinuities increase at high data-rates, making it difficult to compensate the channel. In this work, we target serial links from auto-negotiation in 100G-KR4...
The world's first CMOS "gearbox LSI" based on 65-nm CMOS technology-namely, a 2-W 100-gigabit-Ethernet gearbox LSI combining a 10:4 multiplexer and a 4:10 demultiplexer-was developed. Its power consumption is 75% lower than that of a conventional SiGe-based gearbox LSI. The power consumption of its 12.5-Gb/s interface is 0.98 mW/(Gb/s), while that of its 25- Gb/s interface is 14 mW/(Gb/s).
The first CMOS “gearbox LSI” based on 65-nm CMOS technology—namely, a 2-W 100-Gigabit-Ethernet gearbox LSI combining a 10:4 multiplexer and a 4:10 demultiplexer—was developed. Its power dissipation is 75% lower than that of a conventional SiGe-based gearbox LSI. To develop this low-power gearbox LSI, the power dissipation of its 25-Gb/s interface is decreased to 14 mW/Gb/s by three circuit schemes:...
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