A 16MHz CMOS RC Frequency Reference with ±400ppm Inaccuracy from -45°C to 85°C After Digital Linear Temperature Compensation

📋 论文概要

本文提出一种16MHz CMOS RC频率参考，通过数字线性温度补偿在-45°C至85°C范围内实现±400ppm的精度，旨在替代传统的石英晶体振荡器以降低系统成本和功耗。该设计在标准CMOS工艺中集成了RC时间常数，功耗低于1mW，适用于USB 2.0等有线通信标准。

💡 主要创新点

• 采用数字线性温度补偿技术，在宽温度范围内实现高精度频率参考，无需外部晶体。
• 基于RC时间常数的架构实现了低功耗（<1mW）与竞争性精度（±400ppm）的平衡。

🏷 关键词

📄 原文摘要

Systems-on-chip traditionally rely on bulky quartz crystals to comply with wired communication standards like CAN or USB 2.0. Integrated frequency references with better than 500ppm inaccuracy could meet this need, resulting in higher integration and lower cost. Candidate architectures have employed RC-, LC- or TD (thermal diffusivity)- based time constants, all of which can be realized in standard CMOS. Compared to LC (~20mW, ~100ppm) [1] or TD (~2mW, ~1000ppm) [2] references, RC references offer the lowest power consumption and competitive accuracy (<1mW, 200ppm) [3]. However, due to the nonlinear temperature dependence of on-chip resistors, such references require complex temperature-compensation schemes based on higher-order correction polynomials and extensive calibration [3,4], or complicated analog compensation networks [5]. In this work, we present a 16MHz RC-based frequency reference that achieves

👥 作者与机构

Çağrı Gürleyük, Sining Pan, Kofi A. A. Makinwa

Delft University of Technology, Delft, The Netherlands