NEW DARK CURRENT SUPPRESSION CMOS READOUT CIRCUIT WITH NOVEL CDS STRUCTURE FOR LARGE FORMAT QWIP FPA  

作　　者：ZhangZhi YuanXianghui HuangYoushu LuGuolin 

机构地区：[1]ShanghaiInstituteofTechnicalPhysics,ChineseAcademyofSciences,Shanghai200083 [2]KeyLabofOptoelectronicTechnologyandSystemoftheEducationMinistryofChina

出　　处：《Journal of Electronics(China)》2004年第5期384-391,共8页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.60077025)

摘　　要：A new Dark Current Suppression (DCS) CMOS readout circuits for large format Quantum-Well-Infrared Photo-detector (QWIP) Focal-Plane-Array (FPA) with novel Correlated-Double-Sampling (CDS) structure based on dynamic source-follower are proposed, which can overcome the drawbacks of the present techniques, such as sensitive to the non-uniformity of the QWIP materials, poor readout noise features, low frame frequency, limited injection efficiency and dynamic range, etc. The dummy is adopted to realize dark current suppression, while the cascode current mirror (with current ratio of 1:10) can increase charge sensitivity and reduce integration time. Through the novel CDS structure, the output waveform is boxcar, and the frame frequency is increased. Simulation results demonstrate that, in high background sense, the proposed DCS circuit can suppress the dark current, achieve good readout performance, such as low power consumption, high charge sensitivity, high resolution, large dynamic range, and insensitive to the non-uniformity of the QWIP materials.A new Dark Current Suppression (DCS) CMOS readout circuits for large format Quantum-Well-Infrared Photo-detector (QWIP) Focal-Plane-Array (FPA) with novel CorrelatedDouble-Sampling (CDS) structure based on dynamic source-follower are proposed, which can overcome the drawbacks of the present techniques, such as sensitive to the non-uniformity of the QWIP materials, poor readout noise features, low frame frequency, limited injection efficiency and dynamic range, etc. The dummy is adopted to realize dark current suppression, while the integration time. Through the novel CDS structure, the output waveform is boxcar, and the frame frequency is increased. Simulation results demonstrate that, in high background sense, the proposed DCS circuit can suppress the dark current, achieve good readout performance, such as low power consumption, high charge sensitivity, high resolution, large dynamic range, and insensitive to the non-uniformity of the QWIP materials.

关 键 词：Dark Current Suppression (DCS) Correlated-Double-Sampling (CDS) Quantum-Well-Infrared-Photo-detector(QWIP) Focal-Plane-Array (FPA) Dynamic source-follower Cas-code current mirror Fixed-pattern-noise 

分 类 号：TM862[电气工程—高电压与绝缘技术]