针对通常比幅单脉冲接收机中中放自动增益控制系统在信号强度快速变化及脉冲重复频率可变情况下遇到的困难,本文给出了一种新的中放自动增益控制系统.文中首先简要回顾了从时域性能出发进行AGC设计的概念,随后详细介绍了和、差中放与AGC电路的电路实现方法及相应的设计考虑,最后并给出了若干主要指标的测试结果及外场试验的一些结果. Aiming at the difficulty of fast gain and pulse repetition frequency variation of a medium gain automatic gain control system in a single pulse receiver, a new medium gain automatic gain control system is presented in this paper. This paper briefly reviews the concept of AGC design starting from the performance of time domain, and then introduces the circuit implementation methods and corresponding design considerations of the difference amplifier and AGC circuit in detail. Finally, the test results of several key indicators and the field test Some of the results.