08/21/2024, 09:18 PM UTC
DDR5通道信号完整性设计的挑战Challenges in DDR5 Channel SI Design
➀ DDR5继续提高数据速率，使用单端数据线，并在DRAM端考虑使用DFE来减轻信号完整性问题。 ➁ DDR5与SerDes的主要差异包括链接数量和通道长度，DDR5是多点的且较短。 ➂ 均衡技术如CTLE、DFE和FFE用于补偿通道损耗和色散，由于DDR5易受反射影响，DFE特别有效。 ➃ 仿真结果显示，虽然均衡并非总是必需，但对于涉及DIMM插槽和更高数据速率的特定配置至关重要。➀ DDR5 continues to increase data rates, using single-ended data lines and considering DFE at the DRAM side to mitigate signal integrity issues. ➁ Differences between DDR5 and SerDes include the number of links and channel lengths, with DDR5 being multipoint and shorter. ➂ Equalization techniques like CTLE, DFE, and FFE are used to compensate for channel losses and dispersion, with DFE being particularly effective for DDR5 due to its susceptibility to reflections. ➃ Simulation results show that while equalization is not always necessary, it is crucial for certain configurations involving DIMM slots and higher data rates.
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