Energy-Efficient Low-Noise CMOS Image Sensor with Capacitor Array-Assisted Charge-Injection SAR ADC for Motion-Triggered Low-Power IoT Applications

📋 论文概要

该论文提出一种用于运动触发式物联网图像传感器的电容阵列辅助电荷注入SAR ADC，通过运动检测触发全阵列捕获以降低功耗，同时实现了低噪声和高能效。

💡 主要创新点

• 采用电容阵列辅助电荷注入技术改进SAR ADC结构，在低功耗下实现低噪声性能
• 引入运动检测触发机制，对重采样帧进行运动检测，仅在检测到活动时启动全帧捕获，显著降低系统功耗

🏷 关键词

📄 原文摘要

life, the demand for different sensor modalities, especially imaging, is rising. IoT imagers are often compact and have small form-factor batteries and thus must be designed with both low power (improving battery life) and high image quality (maximizing utility). Previously reported sensors [1,2], along with this work, adopt motion-detection (MD) triggering of full-array capture where MD is performed on a heavily subsampled frame to enable continuous low-power operation. MD limits energyhungry full-array captures to cases where activity is detected. To further reduce power consumption, the full-frame capture energy itself needs to be addressed, which is typically dominated by the ADC. Conventional imagers use a single-slope ADC with 4T pixel structure [1], which provides high fidelity but is inherently energy inefficient. This is particularly the

👥 作者与机构

Kyojin D. Choo, Li Xu, Yejoong Kim, Ji-Hwan Seol, Xiao Wu,

Dennis Sylvester, David Blaauw University of Michigan, Ann Arbor, MI As IoT is increasingly integrated into our everyday