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介绍了一种借助Ｄ／Ａ输出模拟程控基准源，采用电平移动的方法来提高Ａ／Ｄ转换分辨率的方法，并介绍了它在样品电阻温度特性数据采集系统中的应用。
A method to improve the resolution of A / D conversion by using D / A output analog programmable reference source and level shift method is introduced. Its application in the data acquisition system of temperature characteristics of sample resistance is introduced.