电子学报2025，Vol.53Issue(4)：1192-1200,9.DOI:10.12263/DZXB.20240948
基于负电容电路的高速列总线读出方法
High-Speed Column Bus Readout Method Based on Negative Capacitance Circuit
摘要
Abstract
Aiming at the problem of the long establishment time of the column bus signal in large array CMOS image sensors,a high-speed column bus signal reading method is proposed in this paper.Based on negative capacitance technolo-gy,the negative capacitance circuit is integrated into the column-level readout circuit to offset the negative influence of col-umn bus parasitic capacitance on the establishment time of column bus signal.At the same time,based on the dynamic loop stability regulation technology,the design contradiction between readout speed and loop stability is balanced.Based on 55 nm 1P4M CMOS technology,detailed circuit design and comprehensive simulation verification of the proposed high-speed col-umn bus readout method are completed in this paper.Under the design conditions that the pixel size is 10 µm×10 µm,the tail current is 5 µA,and the column bus output voltage swing is 1.2 V,the rise time of the column bus signal is reduced from 1.721 µs to 1.204 µs,which is reduced by 30.04%.The fall time of column bus signal is reduced by 51.28%from 5.780 µs to 2.816 µs.In addition,row fixed mode noise(RFPN)is reduced from 1.30%to 0.01%.Under the power con-sumption of 1.6 W,the frame rate and dynamic range of the large array CMOS image sensor designed in this paper reach 27 fps and 85 dB respectively.It provides a certain theoretical support for the design of large array high-speed and low-pow-er CMOS image sensors.关键词
CMOS图像传感器/超大面阵/高速读出/列并行/负电容电路Key words
CMOS image sensors/large array/high-speed readout/column parallel/negative capacitance circuit分类
信息技术与安全科学引用本文复制引用
许睿明,郭仲杰,刘绥阳,余宁梅..基于负电容电路的高速列总线读出方法[J].电子学报,2025,53(4):1192-1200,9.基金项目
国家自然科学基金(No.62171367) （No.62171367）
陕西省创新能力支撑计划项目(No.2022TD-39) National Natural Science Foundation of China(No.62171367) （No.2022TD-39）
Shaanxi Province Innovation Capability Support Plan(No.2022TD-39) （No.2022TD-39）
