An Over 140 dB Dynamic Range CMOS Image Sensor Combined DCG and Logarithmic Response

被引：4

作者：

Lou, Shanshan ^{[1
]}

Qu, Yang ^{[1
]}

Zhong, Guoqiang ^{[1
]}

Cheng, Yu ^{[1
]}

Xiong, Botao ^{[1
]}

Zhou, Quan ^{[2
]}

Li, Yang ^{[2
]}

Wang, Xinyang ^{[2
]}

Chang, Yuchun ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Microelect, Dalian 116024, Peoples R China

[2] Gpixel Inc, Changchun 130111, Peoples R China

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2023年 / 70卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Index Terms-CMOS image sensor; dual conversion gain (DCG); high dynamic range (HDR); logarithmic;

D O I：

10.1109/TED.2023.3299907

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A dynamic range enhancement pixel architecture based on a standard CMOS image sensor (CIS) process with a pinned photodiode (PPD) is proposed, combining dual conversion gain (DCG) and logarithmic response. Due to a unique charge compensation mechanism of the proposed pixel, in a single exposure, three images are captured with the same integration time, related to different incident light levels. As a result, an over 140 dB dynamic range image is able to be obtained by merging these images. Photo response measurements show the image sensor exhibits over 92 dB linear dynamic range and more than 51 dB logarithmic dynamic range, without signal-to-noise ratio (SNR) performance degradation under low light conditions.

引用

页码：4719 / 4724

页数：6

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