高精度四象限电源的校准原理及方法

Calibration Principle and Method of High Precision Four Quadrant Power Supply

随着高精尖科技的发展的需求,集成芯片也在快速升级换代,对电子产品,尤其是集成电络(IC)主要参数电流和电压的测试领域提出了更高的要求。目前,集成电路测试技术及产品均被国外企业垄断,国内仍处于成品引进。其进口成本很高、兼容性不强,且维护升级困难。若采用传统电源,则需要电子负载及高精度电压、电流表等器件搭建组合试验平台,使测试程序复杂、劳动强度增大。高精度四象限电源不仅有效避免了只能在一、三象限工作的局限性,而且利用最小二乘法拟合原理作为系统校正线性关系曲线的方法,进一步减小了系统误差,使输出电压偏差<0.2%。输出电流偏差<0.5%,完全符合技术规范要求。试验对比表明,该产品达到了预期的研发目标。进一步改进操作流程后,其可以应用于工业化集成芯片的主要参数测试。今后的研究方向为优化算法、提高精度、扩展接口、增强兼容性。

With the development of advanced science and technology,integrated circuits are also being rapidly upgraded for electronic products,especially put forward the higher requirements for main parameters,current and voltage,of integrated circuit(IC)testing field.The IC test technology and products are monopolized by foreign enterprises at present,the domestic market is still dependent on imports of finished products,the import cost is high,compatibility is not strong,and it's hard to upgrade.If using normal power supply,the electronic load and high precision voltage,ammeter and other devices to build a combined experiment platform are needed,so that the test program is complex,the workload has increased dramatically.High-precision four-quadrant power supply is not only effectively avoiding the limitation of only working in the first and third quadrants,but also further reducing the system error,and making the output voltage deviation<0.2%,output current deviation<0.5%using the least square fitting principle as a linear system calibration curve method.The technical specification requirements are fully satisfied.Experimental comparison shows that the product has achieved the expected research target,and can be applied to the main parameters test of industrial integrated circuits after further improvement of the operation process.Optimizing algorithm,improving precision,extending interface and enhancing compatibility are the main research directions in the future.