光电辨认机电子线路的设计

THE DESIGN OF THE ELECTRONIC CIRCUITS OF THE OPTICAL-ELECTRONIC COLOUR SORTER

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。

The major constituents of the electronic circuits of the optical-electronic colour sorter are the high gain, low drift operational-amplifiers, the pulse amplitude discriminator, and the delay circuits consisting of shift registers.On the basis of presenting briefly the function of the electronic circuits of the machine, this paper analyzes principally the coupling mode between the transducer and the input terminals of the pre-amplifier, the problems related with high gain, low drift characteristics, the automatic stabilized zero voltage level circuits of the pulse amplitude discriminator, and the delay circuits consisting of shift registers. The relation between the circuit parameters and the characteristics of the machine as a whole has been studied. Finally, the criterion for the selection of the circuit parameters has been proposed.