⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种4阶级联噪声整形SAR ADC，通过级联结构实现高阶噪声整形，无需复杂有源电路，解决了传统Sigma-Delta ADC依赖运放导致的工艺缩放困难和能效问题。该ADC在100kHz带宽内实现了88dB的SNDR，适用于音频和传感器等亚MHz带宽应用。
High-resolution, sub-MHz-bandwidth data converters are essential for audio and sensor applications and are conventionally implemented as sigma-delta (SD) converters. The dependence of SD ADCs on op-amps inherently results in difficulties for process scaling, power efficiency improvement, and area reduction. A promising alternative to SD ADCs is the emerging noise-shaping (NS) SAR ADC, which provides high resolution with high energy efficiency and compactness. For medium-high SNR applications, some NS-SAR ADCs already exhibit better performance than SD ADCs [1-2]. However, NS-SARs for applications that require SNR >85 dB and hundreds of kHz of bandwidth are currently lacking. The SNR is limited because most recent NS-SAR ADCs are restricted to a low-order NTF. Additionally, noise from the loop filter limits performance. In this work, we propose a cascaded-noise-shaping (CaNS) SAR architecture that cascades two
Lu Jie, Boyi Zheng, Hsiang-Wen Chen, Runyu Wang, Michael P. Flynn
University of Michigan, Ann Arbor, MI