近几年来,随着精密测试技术的发展,提高电流标准的精度成了一个重要的研究课题。日本电子技术综合研究所(简称电综研)利用质子回转磁比率γ_p~′的精密测量,进行了高精度电流标准的研究。现将其概况介绍如下。一、电流标准与γ_p~′按国际单位制定义直接确定电流单位的方法,以前是用电流天平和电功率计。但是用这种方法欲获得1×10~(-6)精度的电流标准很困 In recent years, with the development of sophisticated test technology, improving the accuracy of the current standard has become an important research topic. Japan Institute of Electronic Technology (referred to as electrical research) using proton gyromagnetic ratio γ_p ~ ’of precision measurement, conducted a high-precision current standards. Now the overview is as follows. First, the current standard and γ_p ~ ’According to the definition of the system of units of the direct determination of the current unit method, previously used current balance and power meter. But using this method to get the current standard of 1 × 10 -6 precision is very troublesome