An 850μW 2-to-5GHz Jitter-Filtering and Instant-Toggling Injection-Locked Quadrature-Clock Generator for Low-Power Clock Distribution in HBM Interfaces

📋 论文概要

该论文提出了一款用于HBM4的注入锁定正交时钟生成器，功耗仅850μW，频率范围2-5GHz，具备抖动滤波和即时切换功能，解决了低功耗时钟生成中的抖动抑制和快速响应问题。

💡 主要创新点

• 采用注入锁定架构实现低功耗正交时钟生成，显著降低功耗至850μW。
• 提出抖动滤波技术，有效抑制时钟抖动，保证高频时钟质量。
• 实现即时切换功能，支持快速频率切换，满足HBM4动态需求。

🏷 关键词

📄 原文摘要

KAIST, Daejeon, Korea 1 2 *Equally Credited Authors (ECAs) The explosive expansion of generative AI, in various industries, has led to a surge in demand for high-bandwidth memory (HBM) devices that feature thousands of DQ pins to maximize data bandwidth (BW) [1-3]. The next-generation HBM4 is expected to achieve over 2TB/s using 64 DWORDs, each with 32 DQ pins in six DQ groups (GRs). Like other DRAM devices, HBM operates internally at a quarter rate to ensure timing margins: utilizing quadrature clocks SIN,X, where X = {I, Q, IB, QB}, each operating at fQCK = 2.5GHz (with a period of TQCK = 400ps), which are generated from the differential WDQS within each DWORD. Top left of Fig. 22.2.1 shows a typical clock-distribution network (CDN) in HBM interfaces [4]. In this scheme, all four SIN,X are transmitted separately to DQ GRs through parallel routings and repeaters, presenting challenges that are particularly critical for HBM. The parallel

👥 作者与机构

Jeongbeom Seo*1, Yoonseo Cho*1,2, Yuhwan Shin1,2, Jaehyouk Choi1

Seoul National University, Seoul, Korea