一、概述光电耦合器件是七十年代发展的电子元件的新品种。它是由一发光元件和一光敏元件组合而成的。为了实现波长的最佳匹配,光电耦合器件的发光部分通常以砷镓材料(GaAs)来制备,受光部分用硅光敏二极管或光敏三极管组成。光电耦合器件是由发光和光敏管同时封在一个外壳内,实现对外来光的隔离。并且通过光可把电压不同的回路间以简单的方法组合起来。因而它是作为分立元件发展而成的一种复 I. Overview Optocoupled devices are the new varieties of electronic components developed in the seventies. It consists of a light-emitting element and a photosensitive element combination. In order to achieve the best matching wavelength, the light-emitting part of the optocoupler is usually made of arsenic gallium (GaAs) material, the light-receiving part of the silicon photodiode or phototransistor composition. Optocoupled devices by light and light-sensitive tube sealed in a shell at the same time, to achieve the isolation of external light. And through the light can be different voltage loop between the simple combination of methods. Thus it is a complex developed as a discrete component