A 6Gb/s Receiver with 32.7dB Adaptive DFE-IIR Equalization

📋 论文概要

提出一种6Gb/s接收器，采用自适应DFE-IIR均衡结构，在减少抽头数量的同时补偿长尾码间干扰，实现了32.7dB的均衡能力。

💡 主要创新点

• 将判决反馈均衡器（DFE）与无限脉冲响应（IIR）滤波器结合，用少量抽头有效补偿长尾ISI，降低功耗和面积。
• 采用自适应算法动态调整均衡系数，适应不同信道长度和环境变化。

🏷 关键词

📄 原文摘要

To ensure the signal integrity over a lossy channel, an analog equalizer and/or a decision-feedback equalizer (DFE) [2-6] are widely adopted in high-speed data transmission. An adaptive analog equalizer or adaptive DFE is also attractive to compensate the frequency-dependent loss due to the different channel lengths and environment variations. Conventionally, a multiple-tap DFE is adopted to compensate the inter-symbol interference (ISI), which is induced by postcursors due to the non-ideal channel impulse responses. To avoid the power and area penalty due to many postcursors, a DFE with infinite impulse response (IIR) filter feedback [2] has been presented. In [2], no adaptation scheme ensures that such IIR filter cancels the postcursors precisely, i.e., its RC time constant and amplitude need to be manually adjusted. In this work, a 6Gb/s receiver using a DFE with an adaptive continuous-time IIR filter and a clock/data recovery (CDR)

👥 作者与机构

Yi-Chieh Huang, Shen-Iuan Liu

National Taiwan University, Taipei, Taiwan