A 150kHz-BW 15-ENOB Incremental Zoom ADC with Skipped Sampling and Single Buffer Embedded Noise-Shaping SAR Quantizer

📋 论文概要

该论文提出了一种采用跳过采样和单缓冲嵌入式噪声整形SAR量化器的增量式Zoom ADC，解决了传统Zoom ADC只能处理准静态信号且转换速度慢的问题，实现了150kHz带宽和15-ENOB的高能效高分辨率转换。

💡 主要创新点

• 提出跳过采样（Skipped Sampling）技术，减少冗余采样，提高转换效率。
• 采用单缓冲嵌入式噪声整形SAR量化器，简化电路结构并降低功耗。
• 动态Zoom架构实现粗量化和细量化同时进行，支持动态信号转换。

🏷 关键词

📄 原文摘要

good energy efficiency. Lately, the incremental ADC is drawing rising attention by favoring system integration with its easy multiplexing and simple digital filtering. By combining a low-power SAR with a low-distortion ∆Σ modulator, the zoom architecture achieves high energy efficiency and high resolution simultaneously [1-2]. However, the conventional zoom ADC can only convert quasi-static signals, since the two stages operate sequentially, and its ∆Σ conversion operates at a slow speed. The dynamic zoom architecture performs coarse and fine conversions concurrently, thus being able to convert varying inputs [3-4]. Yet, limited by the low quantization level of the fine ∆ΣM, it requires a large OSR for the targeted resolution (e.g., 282.25 in [3] and 87.5 in [4]),

👥 作者与机构

Zongnan Wang1, Lu Jie2, Zichen Kong1, Mingtao Zhan2, Yi Zhong2, Yuan Wang1, Xiyuan Tang1

Peking University, Beijing, China, 2Tsinghua University, Beijing, China 1 Many IoT applications demand ADCs with high resolution, medium bandwidth, and