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首页> 外文学位 >A distributed amplifier-based active transversal filter MMIC with positive and negative adjustable tap weights for very high-speed lightwave systems.
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A distributed amplifier-based active transversal filter MMIC with positive and negative adjustable tap weights for very high-speed lightwave systems.

机译：基于分布放大器的有源横向滤波器MMIC，具有正负可调抽头权重，适用于超高速光波系统。

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摘要

A distributed amplifier based 5-tap transversal filter using MESFET implementation of the Gilbert Cell as the tap weights has been designed for use as a fractionally spaced adjustable equalizer in high speed optical communication systems. The effective transconductance of the Gilbert Cell can be adjusted from negative to positive values and therefore the transversal filter designed has adjustable positive and negative tap weights. With these tap weight variation capabilities the frequency response of the filter can be significantly altered making it an attractive candidate for adaptive pulse shaping in optical receivers. This is the first time a transversal filter with adjustable positive and negative has been implemented. In this thesis a review of intensity modulation/direct detection (IM/DD) optical communications is provided with an emphasis placed on the requirement for adaptive linear equalization using the transversal filter. The fundamental theory behind the transversal filter is then presented. Next, the design techniques used in order to achieve a transversal filter with positive and negative adjustable tap weights are discussed. These include a discussion of the transversal filter building blocks: the distributed amplifier, lumped element artificial transmission lines and the Gilbert Cell. Once the building blocks are outlined the entire transversal filter MMIC design is introduced. Finally, simulated and measured frequency response and transient response results are presented for various tap weight configurations. Frequency response results demonstrate the transversal filter is capable of achieving a variety of filtering functions. Transient response results demonstrate the transversal filter's ability to alter the pulse shape in a 2.5Gb/s system.
机译：使用吉尔伯特单元的MESFET实现作为抽头权重的基于分布式放大器的5抽头横向滤波器已被设计为在高速光通信系统中用作分数间隔可调均衡器。吉尔伯特单元的有效跨导可以从负值调整为正值，因此设计的横向滤波器具有可调的正和负抽头权重。利用这些抽头权重变化功能，可以显着改变滤波器的频率响应，使其成为光接收器中自适应脉冲整形的有吸引力的候选者。这是首次实现具有可调正负值的横向滤波器。在本文中，对强度调制/直接检测（IM / DD）光通信进行了回顾，重点放在了使用横向滤波器对自适应线性均衡的要求上。然后介绍了横向滤波器背后的基本理论。接下来，讨论了用于实现具有正负可调抽头权重的横向滤波器的设计技术。其中包括对横向滤波器构建块的讨论：分布式放大器，集总元件人工传输线和吉尔伯特单元。概述了构建模块后，便会引入整个横向滤波器MMIC设计。最后，给出了各种抽头重量配置的仿真和测量频率响应和瞬态响应结果。频率响应结果表明，横向滤波器能够实现多种滤波功能。瞬态响应结果证明了横向滤波器在2.5Gb / s系统中改变脉冲形状的能力。

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  • 作者

    Lee, John Joseph (Jay).;

  • 作者单位

    Queen's University at Kingston (Canada).;

  • 授予单位 Queen's University at Kingston (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.Sc.
  • 年度 2000
  • 页码 90 p.
  • 总页数 90
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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