放大器,脉冲幅度鉴别器和由移位寄存器组成的延时器,是光电辨认机电子线路的主要组成部分。在简要地介绍了该机整体电子线路的基础上,本文分析了前置放大器的输入耦合方式,高增益,低漂移问题,鉴别器自稳零电路和延时器电路。研究了电路参数与整机性能之间的关系。提出了这些参数的选择原则。 Amplifiers, pulse amplitude discriminators, and delay registers made up of shift registers are the main components of a photo-reader electronics. Based on a brief introduction of the overall electronic circuit of the aircraft, this paper analyzes the preamplifier input coupling, high gain, low drift, discriminator self-zeroing circuit and delay circuit. The relationship between circuit parameters and overall performance is studied. Proposed the principle of choosing these parameters.