GHz-Range Continuous-Time Programmable Digital FIR with Power Dissipation that Automatically Adapts to Signal Activity

📋 论文概要

该论文提出了一种基于连续时间数字信号处理（CT DSP）的可编程数字FIR滤波器，采用电平交叉采样替代传统时钟采样，实现了与信号活动相关的自适应功耗，并避免了混叠问题。该设计适用于GHz范围的多标准应用，无需复杂的抗混叠滤波器。

💡 主要创新点

• 采用连续时间数字信号处理架构，利用电平交叉采样实现无时钟操作，从根本上消除混叠问题。
• 功耗随信号活动自动调整，在低信号活动时显著降低功耗，适用于多种信号场景。
• 实现了GHz范围的可编程数字FIR滤波器，支持多种标准，无需高速时钟和复杂抗混叠滤波器。

🏷 关键词

📄 原文摘要

2 Columbia University, New York, NY, CEA-LETI-MINATEC, Grenoble, France GHz-range applications that operate in a variety of signal situations and/or multiple standards require highly programmable responses that cannot be provided by analog circuits. Conventional digital solutions suffer from aliasing, thus requiring a complicated antialiasing filter and/or extremely high clock speeds with high power dissipation. An alternative is continuous-time (CT) DSP [1], which uses level-crossing sampling [2] but without a clock. It offers activitydependent power dissipation, is alias-free and has lower EMI emissions. This technique has so far been demonstrated in the voice band [3] but cannot be pushed beyond the MHz range because it involves extremely narrow pulse widths that cannot be handled by digital logic. This work bypasses this timing problem, enabling a five-orders-of-magnitude improvement in frequency capability compared to [3], thus making CT DSP a candidate for wideband GHz lowdynam

👥 作者与机构

Mariya Kurchuk1, Colin Weltin-Wu1, Dominique Morche2, Yannis Tsividis1