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.
出处
《电子器件》
CAS
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
关键词
微弱信号
放大电路
ORCAD
仿真分析
低噪声设计
faint current signal
amplifying circuit
ORCAD
simulative analysis
low noise design
