A 1ps-Resolution 2ns-Span 10Gb/s Data-Timing Generator with Spectrum Conversion

📋 论文概要

本文提出一种基于频谱转换技术的10Gb/s数据定时发生器，实现了1ps分辨率和2ns延迟范围，有效抑制了延迟门的群延迟偏差，将输出抖动降低至传统方案的1/3。该发生器可工作于DC至11Gb/s的宽频率范围，延迟超过20倍数据周期。

💡 主要创新点

• 采用频谱转换技术，将延迟门的群延迟偏差转换为高频分量并通过滤波抑制，使输出抖动降低为传统DTG的三分之一。
• 实现了超过20倍数据周期（2ns）的延迟范围，同时保持1ps的分辨率，支持DC至11Gb/s的宽工作频率。

🏷 关键词

📄 原文摘要

NTT, Atsugi, Japan Gunma University, Kiryu, Japan 2 The data-timing generator (DTG) presented herein provides a delay of over 20× of the 10Gb/s data cycle, and operates over the wide frequency range of DC to 11Gb/s. The total peak-to-peak jitter of a 2ns-delayed 10Gb/s pseudo-random bit stream of 231-1 (PN31) output data is 12pspp including 7pspp of input-data jitter. Since the DTG uses a spectrum-conversion technique that suppresses the effect of the group-delay deviation of the delay gates, its output jitter is reduced to one-third that of a conventional DTG. DTGs are essential to adjust the delays of parallel paths in optical systems [1] and test equipment [2]. DTGs that do not require a clock [3] are very useful because they can easily add a delay of over one data cycle regardless of the data rate. Compensation of the dispersion delay difference among different optical wavelength signals requires both long delay adjustment span and high

👥 作者与机构

Tomoaki Kawamura1, Yusuke Ohtomo1, Kazuyoshi Nishimura1, Noboru Ishihara2