硅光二极管光电检测电路的研究与设计

Design of silicon photodiode photoelectric detection circuit

为了满足对较微弱光信号高精度的检测要求,在详细分析了硅光二极管光电检测电路的线性响应及噪声特性的基础上,提出了对相关器件选型和电路设计形式的基本要求,并以硅光二极管探测器件DET36A及低噪声、高精度运放芯片ICL7650为例设计测试了一种可方便嵌入应用于微弱光环境下的光电检测电路。经过实验测试表明,在0.1～10 Lux低照度弱光照射下,该电路具有较好的低噪声输出特性和良好的线性响应。

In order to meet the requirement of light signal detection with higher precision,the linear response and noise characteristics of photoelectric detection circuit using silicon photodiode was analyzed,and the basic requirements of the related devices selection and the form of circuit design was suggested.The silicon photodiode detector（DET36A） and operational amplifier chip with low noise and high precision（ICL7650） were used to design a simple photoelectric detection circuit for weak light environment.The experiment result shows that the circuit has the characteristics of low noise and good linear response with the weak light intensity in the ranger of 0.1~10Lux.