强磁场电源精密电压参考源的设计  

Design of Precision Voltage Reference for High Magnetic Field Power Supply

作　　者：段娟[1] 刘小宁[1] 陈滋健[1] 

机构地区：[1]中国科学院合肥物质科学研究院,安徽合肥230031

出　　处：《微计算机信息》2008年第25期234-236,共3页Control & Automation

摘　　要：本文首先提出了强磁场电源电压参考源的设计要求即高稳定和可程控,然后在分析影响该电压参考源稳定度的关键因素的基础上选取了有效的数模转换芯片DAC1220和其基准电压源MAX6325,并给出了整个系统的硬件设计和各部分的软件设计,实验结果表明,数模转换输出能产生程序控制的按照设定斜率上升的电压曲线,并且在严格控制温度的条件下,设定值处能取得预期的8小时内良好的稳定性。Firstly this paper puts forward the demand for high magnetic field power supply, which is highly stable and programmable. Then the key points which affect the stability of the voltage reference are concluded in this paper. According to these factors hard-ware design and software design are given for the system and its components. The test proves that output voltage of the converter is increased with a set ramp rate by the program and good stability appears over an 8 h period of time under the strict control of temperature with the voltage set point fixed.

关 键 词：稳定度 温度系数 数模转换器 程序控制 数据采集 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]