基于光电倍增管的低噪声前置放大器的设计及其信号处理

摘要

利用低噪声前置运算放大器把光电倍增管的输出信号尽可能无噪声的放大.从运放的选择,多级放大电路的设计要点,放大电路的噪声估算,PCB板布局连线和屏蔽等方面,提出了实用化的带宽达10 MHz的电路设计形式,以及注意事项及其信号调理方法.仿真结果显示了所设计电路的信号放大情况,此电路设计形式可以很好的放大并处理光电倍增管的输出信号.%Using the low noise preamplifier to amplify the output signal of photomultiplier tube without noise as soon as possible,this article describes the design principles of the photomultiplier tube selection and application.From the op-amp selection,multistage amplifier circuit design,circuit noise estimation,PCB board layout line and shielding,a practical circuit design of 10 MHz bandwidth is proposed;and also matters needing attention and its signal processing method.The simulation results show that the signal amplifying circuit designed,this circuit design can be very well amplifying and processing the output signal of the photomultiplier tube.