摘要
提出将APD与前置放大器电路配合使用的最佳方法。利用光电转换信噪比数学模型,确定选择与APD匹配的电路器件,给出了前置放大器采用低噪声的分体器件与集成运算放大器相组合的设计方法。通过对前置放大器重要参数信噪比进行测量和分析。结果表明,该探测器电路信噪比优于直接与集成运算放大器匹配的探测器电路,且可靠性高,宜扩展,具有广泛的应用前景。
The paper proposes the best way to combine APD with photoelectric detector,and how to reasonably choose the circuit component which is matched with APD by using photoelectric conversion SNR mathematics model. The design method of combining the preamplifier,which adopts low noise separated parts with integrated operational amplifier is introduced. By detecting and analyzing the SNR of important parameter of preamplifier,it shows that the SNR of this detector circuit is better than that of the detector which is directly matched with integrated operational amplifier. So, this kind of detector is stable and easy to develop into other forms and the prospect of wide application is definite.
出处
《现代电子技术》
2009年第13期177-180,共4页
Modern Electronics Technique
