论文部分内容阅读
一、引言光电耦合用于传递电信号的最大优点在于能够将输入回路和输出回路完全隔离。因而,在具有强弱电回路的控制系统中,光电耦合器作为一种能将强弱电回路进行隔离的信号传递器件,得到了广泛的应用。但从目前的情况看,光电耦合器的这种应用多用于传递开关量信号。然而,在实际控制系统中,除有大量开关量信号要进行传递外,还有许多模拟量信号需进行传递。以往这种强弱电回路之间模拟量的传递一般都采用电压
I. INTRODUCTION The biggest advantage of optocouplers for transmitting electrical signals is the ability to completely isolate the input and output circuits. Therefore, in the control system with strong and weak electrical circuits, the optocoupler has been widely used as a signal transmission device that can isolate the strong and weak electrical circuits. However, from the current situation, optocouplers such applications are often used to transfer digital signals. However, in the actual control system, in addition to a large number of switch signals to be transmitted, there are many analog signals to be passed. In the past this analog circuit between the strength of the return of the general use of voltage transmission