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温度传感器校准系统中红外信号检测电路设计
资料介绍
为了提高红外探测器检测红外微弱信号的精度，采用晶体管恒流偏置电路，使用低噪声高速运算放大器构成了前置放大电路。运用电路理论建立放大电路的噪声等效模型，采用叠加法计算1级放大输出端的噪声电压。通过中温黑体炉红外辐射实验，测试电路性能，取得了500℃-700℃时的电压波形，计算得出信噪比为7．25×10^3。结果表明，红外探测器前置放大电路达到高信噪比、响应速率快、抗干扰强的应用要求，可以对红外微弱信号检测放大。
In order to improve the accuracy of infrared detectors to detect the infrared weak signal, a preamplifier circuit was built with a constant current bias circuit and a low-noise high-speed operational amplifier. The equivalent noisy model was deduced based on the circuit theory. The output vohage noise of the 1 st amplification circuit was calculated with the superposition method. In temperature blackbody furnace experiment, the circuit performance was tested, the voltage waveform at 500℃- 700℃ was obtained, and signal-to-noise ratio of 7.25×10^3 was obtained. The results show that the preamplifier circuit of infrared detection achieves the application goal of high signal-to-noise ratio, response speed and strong anti-jamming performa...
部分文件列表
| 文件名 | 大小 |
| 温度传感器校准系统中红外信号检测电路设计.pdf | 250K |
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