A 1.8e-rms Temporal Noise Over 110dB Dynamic Range 3.4μm Pixel Pitch Global Shutter CMOS Image Sensor

📋 论文概要

本文提出一种具有1.8e-rms时域噪声和110dB动态范围的3.4μm像素间距全局快门CMOS图像传感器，通过采用双增益放大器、模拟信号单斜率ADC和多重累积快门技术，解决了高动态范围成像中低噪声与全局快门性能兼顾的难题。

💡 主要创新点

• 采用双增益放大器与单斜率ADC架构，在保持高动态范围的同时实现低时域噪声
• 设计多重累积快门机制，有效提升全局快门模式下的信噪比和动态范围
• 在3.4μm小像素间距下实现110dB动态范围和1.8e-rms极低时域噪声的突破性性能

🏷 关键词

📄 原文摘要

Masahiro Kobayashi, Yusuke Onuki, Kazunari Kawabata, Hiroshi Sekine, Toshiki Tsuboi, Yasushi Matsuno, Hidekazu Takahashi, Toru Koizumi, Katsuhito Sakurai, Hiroshi Yuzurihara, Shunsuke Inoue, Takeshi Ichikawa Canon, Kanagawa, Japan CMOS image sensors (CIS) with global shutter (GS) function are required in a variety of areas, including broadcasting, automobile, drones, and surveillance applications. For these applications, GS CISs are needed to avoid rolling shutter (RS) distortion. These applications also benefit from the high image quality and high frame rates of GS CISs [1-3]. To realize a GS CIS, a memory structure and additional MOS transistors are necessary. Due to this increase in the number of components, photodiode area is restricted. Therefore, sensor performance (e.g., noise, sensitivity, and saturation) of GS CISs has generally remained inferior to that of RS sensors. To break down this constraint, we introduce a multipleaccumulation shutter technique for GS CISs. Furthermore

👥 作者与机构

with Dual-Gain Amplifiers, SS-ADC and MultipleAccumulation Shutter