本文介绍一种利用晶体管非线性放大特征设计的“凸镜”式放大器,取代常用的触发器脉冲整形电路对神经冲动信号进行预处理,与Z-80单板机并行接口芯片直接配合,利用高速采样子程序对脉冲进行识别和计数,大大提高了对不同幅度脉冲的甄别能力和采样处理速度,平均执行时间约38.5μs,能够检出小至50μs的窄脉冲。 In this paper, we introduce a “convex mirror” amplifier designed by using non-linear amplification of transistors to preprocess the neural impulse signal instead of the common trigger pulse shaping circuit and directly cooperate with the Z-80 single-chip parallel interface chip. The sampling subroutine identifies and counts the pulses, greatly improving the discrimination of different amplitude pulses and the sampling processing speed. The average execution time is about 38.5μs, which can detect narrow pulses as small as 50μs.