A 2mW 70.7dB SNDR 200MS/s Pipelined-SAR ADC with Continuous-Time SAR-Assisted Detect-and-Skip and Open-then-Close Correlated Level Shifting

📋 论文概要

本文提出了一种基于连续时间SAR辅助的检测与跳过（Detect-and-Skip）和开-关相关（Open-then-Close Correl）技术的流水线逐次逼近型ADC。该设计在2mW功耗下实现了70.7dB SNDR和200MS/s采样率，有效解决了高速高精度转换中转换时间与残差放大器速度、功耗之间的矛盾。

💡 主要创新点

• 采用连续时间SAR辅助的检测与跳过技术，通过提前判断并跳过不必要的位循环，缩短SAR子ADC的转换时间。
• 引入开-关相关技术，增强了残差放大器的速度与增益，同时降低功耗。

🏷 关键词

📄 原文摘要

Information Technology of Peking University, Hangzhou, China 1 2 The pipelined-SAR ADC has become popular in wide-bandwidth and high-resolution applications due to its power-efficient architecture [1]. In the pursuit of higher ADC speeds while maintaining precision and power efficiency, not only does the conversion time of the SAR sub-ADC need to be shortened, but also the speed and gain of residue amplifiers (RA) need to be enhanced. Conventional solutions to these two problems, including reducing the bit-cycling time of the SAR and increasing the RA bandwidth, often require extensive power costs, leading to a degraded power efficiency. To address the speed and gain challenges, three techniques are proposed in this work. First, a

👥 作者与机构

Siyuan Ye1, Linxiao Shen1, Jihang Gao1, Jie Li1, Zhuoyi Chen1, Xinhang Xu1,

Jiajia Cui1, Hao Zhang2, Xing Zhang1, Le Ye1,3, Ru Huang1 Peking University, Beijing, China Nano Core Chip Electronic Technology, Hangzhou, China 3 Advanced Institute of