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1.引言大多数国家标准实验室利用约瑟夫森效应来定义它们的电压单位。尽管许多标准实验室仍然广泛采用标准电池来保存1.018V 标准,然而高质量,高稳定的固态电压标准的应用正在
1. Introduction Most national standards laboratories use the Josephson effect to define their voltage units. Although many standard labs still use standard batteries for the 1.018V standard extensively, high quality, high-stability solid-state voltage standards are being used