A 0.076mm2 3.5GHz Spread-Spectrum Clock Generator with Memoryless Newton-Raphson Modulation Profile in 0.13µm CMOS

📋 论文概要

本文提出了一款基于无记忆牛顿-拉夫森调制曲线的扩频时钟发生器(SSCG)，在0.13µm CMOS工艺下实现0.076mm²的小面积和3.5GHz的工作频率，有效降低了高速系统中的电磁干扰(EMI)。

💡 主要创新点

• 提出了一种无记忆牛顿-拉夫森调制曲线生成方法，避免了传统查找表或ΣΔ调制器的面积开销，实现了紧凑的调制波形。
• 通过算法优化，在0.13µm工艺下实现了0.076mm²的超小芯片面积，同时保持了3.5GHz的时钟频率和良好的EMI抑制性能。

🏷 关键词

📄 原文摘要

EMI, which has become a serious problem in high-speed systems. In applications such as serial links, display drivers and consumer electronics, SSCG is essential or strongly recommended. Control options such as frequency deviation (δ) and modulation frequency (fm) help to satisfy these demands. Furthermore, efficient modulation-profile generation is critical for achieving further EMI reduction and lowering fabrication cost. PLL-based SSCGs are reported in [1-3]. The ΔΣ modulator (ΔΣM) controls the division ratio [1,2] and the phase information of phase detector (PD) [3] to generate a spread-spectrum clock. The self-referenced clock generator uses a capacitor array to generate a spread-spectrum clock [7]. However, they do not have a way to control δ and fm. Dual-loop direct VCO modulation [4] and digital period synthesizer with delay-line [5] are able to

👥 作者与机构

Sewook Hwang, Minyoung Song, Young-Ho Kwak, Inhwa Jung, Chulwoo Kim

Korea University, Seoul, Korea A spread-spectrum clock generator (SSCG) is a cost-effective solution to reduce