ORCAD在HgCdTe红外探测器放大电路低噪声设计中的应用  

Research on Low Noise Design of HgCdTe Infrared Detector Amplifying Circuit Based on ORCAD

作　　者：卫翠玉[1,2] 胡炳樑[1] 韶秀娟[1,2] 柳祥[1,2] 于祥凤[1,2] 

机构地区：[1]中国科学院西安光学精密机械研究所光谱成像技术实验室,西安710119 [2]中国科学院研究生院,北京100039

出　　处：《电子器件》2009年第2期324-328,共5页Chinese Journal of Electron Devices

基　　金：国家自然科学基金重点项目资助(60532070);中国科学院“西部之光”项目资助

摘　　要：以HgCdTe光伏型红外探测器的性能指标为基础对入射到探测器表面的辐射能量进行转换计算,并以所得的微弱电流信号为根据对探测器的前置放大电路和二级放大电路进行设计,利用仿真速度快、精度高的ORCAD仿真软件对所设计的低噪声、高增益放大电路的频率响应、电路的直流传输、温度和噪声分析等特性进行了较为全面的仿真,实验结果表明了本设计能有效放大微弱电流信号,可以在实践中验证其正确性和可行性。Focuses on the basis of the performance index of HgCdTe Photovoltaic infrared detector, the conversion of the radiation energy which is incident in the surface of the detector is calculated. According to the calculated faint current signal, the preamplifier circuit and the secondary amplifier circuit is designed. Under the implementation of the high emulational rate and excellent precision of ORCAD, the frequency response ,the transmission of direct current, the analysis of the temperature and noise of the designed amplifier circuit. The experimental result indicates that this design can effectively magnify the faint current signal. So the validity and feasible of the designed amplifier circuit can be validated in practice.

关 键 词：微弱信号 放大电路 ORCAD 仿真分析 低噪声设计 

分 类 号：TN722[电子电信—电路与系统]