Reset noise reduction through column-level feedback reset in CMOS image sensors  

作　　者：李斌桥 徐江涛 谢爽 孙忠岩 

机构地区：[1]School of Electronics and Information Engineering,Tianjin University

出　　处：《Journal of Semiconductors》2011年第2期137-141,共5页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Nos.60806010,60976030);the Research Fund for the Doctoral Program of Higher Education of China(No.200800561111)

摘　　要：A low reset noise CMOS image sensor （CIS） based on column-level feedback reset is proposed. A feedback loop was formed through an amplifier and a switch. A prototype CMOS image sensor was developed with a 0.18μm CIS process. Through matching the noise bandwidth and the bandwidth of the amplifier, with the falling time period of the reset impulse 6μs, experimental results show the reset noise level can experience up to 25 dB reduction. The proposed CMOS image sensor meets the demand of applications in high speed security surveillance systems, especially in low illumination.A low reset noise CMOS image sensor （CIS） based on column-level feedback reset is proposed. A feedback loop was formed through an amplifier and a switch. A prototype CMOS image sensor was developed with a 0.18μm CIS process. Through matching the noise bandwidth and the bandwidth of the amplifier, with the falling time period of the reset impulse 6μs, experimental results show the reset noise level can experience up to 25 dB reduction. The proposed CMOS image sensor meets the demand of applications in high speed security surveillance systems, especially in low illumination.

关 键 词：CMOS image sensor reset noise feedback reset five-transistor pixel global shutter 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TP335.1[自动化与计算机技术—控制科学与工程]