| 红外探测器高性能读出电路的研究 |
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| 引用本文： | 姜俊伟,赵毅强,孟范忠,郭莹.红外探测器高性能读出电路的研究[J].红外与激光工程,2009,38(5). |
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| 作者姓名： | 姜俊伟 赵毅强 孟范忠 郭莹 |
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| 作者单位： | 天津大学,电子信息工程学院,专用集成电路设计中心,天津,300072 |
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| 基金项目： | 国家自然科学基金资助项目(60806010) |
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| 摘 要： | 设计了一种高性能电容反馈跨阻放大器(CTIA)与相关双采样电路(CDS)相结合的红外探测器读出电路。该电路采用CTIA电路实现对微弱电流信号的高精度读出,并通过CDS电路抑制CTIA引入的固定模式噪声(FPN),最后采用失调校正技术减小CDS引入的失调,从而减小了噪声对电路的影响,提高了读出电路的精度。采用特许半导体(Chartered)0.35μm标准CMOS工艺对电路进行流片,测试结果表明:在20pA～10nA范围内该电路功能良好,读出精度可达10bit以上,线性度达97%,达到了设计要求。该读出电路可用于长线列及面阵结构红外探测系统。
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| 关 键 词： | 电容反馈跨阻放大器 相关双采样电路 固定模式噪声 失调校正技术 |
High performance readout integrated circuit for IR detectors |
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| JIANG Jun-wei,ZHAO Yi-qiang,MENG Fan-zhong,GUO Ying.High performance readout integrated circuit for IR detectors[J].Infrared and Laser Engineering,2009,38(5). |
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| Authors: | JIANG Jun-wei ZHAO Yi-qiang MENG Fan-zhong GUO Ying |
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| Affiliation: | ASIC Design Center;School of Electronic and Information Engineering;Tianjin University;Tianjin 300072;China |
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| Abstract: | A kind of readout integrated circuit (ROIC) for long linear IR detectors, composed of capacitor feedback trans -impedance amplifier (CTIA) and correlated double sample (CDS) circuit, was proposed. The readout accuracy of weak current signal was obviously improved by the CTIA circuit. Besides,in order to reduce the fixed patten noise (FPN) induced by CTIA, CDS circuit with offset calibration technique was utilized. By employing the above techniques, the influence of noise on this circuit was greatly reduced.... |
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| Keywords: | CTIA CDS FPN Offset calibration technique |
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