中文摘要：

介绍了一种用于放大甄别辐射探测中的一些快速小信号的电流灵敏型前置放大器的研制。该前放可以实现对幅度几十μA，脉宽10-40ns的电流信号的放大和前沿甄别。文中给出了该前放的具体电路原理图和主要性能参数的测试方法及结果。

英文摘要：

A current-sensitive preamplifier/discriminator used for small fast signals is introduced in this paper. It can amplify and discriminate current signal which has amplitude of tens of μA and pulse-width of 10-40ns. The concrete circuit and the testing method and result of main performance parameters are presented.