高精度激光修调系统电源研究

Research on the Power Supply of High-precision Laser Trimming System

鉴于激光修调系统对电源输出电压精度及纹波的需求,提出了一种正负输出电压同步调节的电路方案,设计了镜像电流源控制的调压电路并研制出了电源样机进行调试。该电源结构简单,实现了高精度电压调整功能,具备了低纹波特性,满足了激光修调系统对电源电压低纹波、高稳定性的使用要求。试验结果表明,设计的电源实现了高精度可调并具有5 mV以下的低纹波输出,符合激光修调系统对电源的需求。

Based on the requirement of laser adjustment system for power supply output voltage accuracy and ripple, the paper proposed a circuit scheme for synchronous adjustment of positive and negative output voltage, designed a voltage regulator circuit controlled by a mirror current source and a power supply prototype for debugging. The power supply that was a simple structure, realized a high-precision voltage adjustment function with low ripple and met the requirement of laser adjustment system. The test result showed that the designed power supply achieved high-precision adjustable and low ripple output below 5 mV, met the requirements of laser trimming system for power supply.