【摘要】 文中介绍了一种新颖的光电耦合器电路 ,能用普通的光电耦合器和简单的电路结构实现精度较高的模拟信号的光电隔离。传统的模拟信号光电隔离电路虽然能实现较高精度 ,但必须使用特殊的光电耦合器产品和多组互相隔离的电源。新方法克服了这些缺陷 ,采用普通光耦产品 ,只需要一组电源 ,同样能实现较高精度的模拟信号光电隔离 ,从而降低新设计的成本。新电路已成功地应用于便携式X射线机产品的电流采样电路中。更多还原

【Abstract】 A new circuit of optocoupler is introduced that can accurately translate analog signal isolated side to side by simple architecture and general purpose optocoupler.Although the classic circuit of optocoupler can translate analog signal with high accuracy,but special optocoupler and several isolated power supplies must be needed.The new method only need general optocoupler and a single power supply,but can accurately translate analog signal isolated,so the costs of design can be decreased if the new circuit to be used.The new circuit has been successful used in the design of current sample circuit of portable X ray generator.更多还原