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介绍了以ＰＣ机为主机构成的薄膜样品磁电阻特性数据采集系统的基本构成、工作原理、主要功能及特点，并介绍了用电压比测量法测量磁场强度的原理以及提高Ａ／Ｄ转换器分辨率的方法
The basic composition, working principle, main functions and characteristics of the system of magnetoresistive characteristic data acquisition of thin film samples with PC are introduced. The principle of measuring magnetic field intensity by voltage ratio measurement and the principle of improving the resolution of A / D converter Rate method