A Rotary-Traveling-Wave-Oscillator-Based AllDigital PLL with a 32-Phase Embedded Phase-toDigital Converter in 65nm CMOS

📋 论文概要

本文提出了一种基于旋转行波振荡器（RTWO）的全数字锁相环（ADPLL），并集成了一个32相嵌入式相位-数字转换器。该架构避免了传统TDC所需的复杂电路和校准，简化了系统设计。

💡 主要创新点

• 采用旋转行波振荡器（RTWO）替代环形振荡器，提供多相时钟信号，实现高分辨率相位检测。
• 提出了嵌入式相位-数字转换器，直接利用RTWO的多相输出进行相位量化，无需额外的TDC和归一化校准。

🏷 关键词

📄 原文摘要

more popular as possible alternatives to conventional analog charge-pump-based PLLs [1]. Currently, most of the ADPLLs are based on a time-to-digital converter (TDC) utilizing inverter delay chains. There have been tremendous efforts to improve TDC performance, i.e., maximizing resolution and reducing power consumption, but they normally require additional complex circuits. Recently, the ring-oscillator-based ADPLLs have been presented in [2, 3], which substantially simplify the architecture of ADPLL by eliminating inverter delay chains as well as calibration routines for period normalization that are required for the conventional TDC-based approach. However, due to the poor phase noise of the ring oscillators and the limited time resolution available from inverters,

👥 作者与机构

Koji Takinami, Richard Strandberg, Paul C. P. Liang,

Gregoire Le Grand de Mercey, Tony Wong, Mahnaz Hassibi Panasonic, Cupertino, CA All-digital phase-locked loops (ADPLLs) have recently become