一种用于红外焦平面阵列的读出电路设计  

A design of readout circuit for infrared focal plane array

作　　者：郑宾 杨海钢 ZHENG Bin;YANG Haigang(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shandong Industrial Institute of Integrated Circuits Technology Co.,Ltd.,Jinan 250001,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学,北京100049 [3]山东产研集成电路产业研究院有限公司,山东济南250001

出　　处：《电子设计工程》2022年第15期104-108,共5页Electronic Design Engineering

基　　金：国家自然科学基金课题(61876172)。

摘　　要：在红外焦平面阵列系统成像过程中,读出电路作为重要组成部分,其噪声大小以及信号处理能力决定了系统成像的质量。文中针对红外焦平面阵列设计了一种具有高线性度、低噪声的读出电路模拟通路结构,该结构主要包括像素单元、电平移位器和相关双采样电路,可以有效抑制电路中存在的FPN噪声。为了验证电路的性能,采用CSMC 0.18μm 3.3 V工艺进行验证,仿真结果表明,输入电流在60~500 pA范围内变化时,电路的线性度为0.9994;在输入电流为500 pA时,电路输出噪声为150μV,动态范围为79 dB。In the imaging process of the infrared focal plane array system,the readout circuit is an important part,and its noise level and signal processing ability determine the quality of the system imaging.In this paper,a readout circuit analog channel structure with high linearity and low noise is designed for infrared focal plane array.This structure mainly includes pixel unit,level shifter and correlated double sampling circuit,which can effectively suppress FPN in the circuit noise.In order to verify the performance of the circuit,the CSMC 0.18μm 3.3 V process is used for verification.The simulation results show that when the input current varies from 60~500 pA,the linearity of the circuit is 0.9994;when the input current is 500 pA,the output noise of the circuit is 150μV,the dynamic range is 79 dB.

关 键 词：红外焦平面 读出电路 像素单元 线性度 

分 类 号：TN215[电子电信—物理电子学]