A single electron pump was incorporated with a quantum Hall resistance and a Josephson voltage for the current evaluation in the framework of Ohm’s law. The pump current of about 60 pA level was amplified by a stable amplifier with a gain of 10³ to induce a Hall voltage of about 60 mV level across a 1 MΩ Hall resistance array, which was compared with the Josephson voltage. The gain of the current amplifier was calibrated with a cryogenic current comparator bridge. For two different drive frequencies and repeated thermal cycles, the comparisons demonstrated that the pump current averaged over the first plateau was equal to ef within the combined uncertainty level of 0.3 10⁻⁶ (k = 1).

单个电子泵与量子霍尔电阻和约瑟夫森电压相结合，用于在欧姆定律的框架内进行电流评估。^{约 60 pA 水平的泵浦电流通过增益为 10 3}的稳定放大器放大，以在 1 MΩ 霍尔电阻阵列上感应出约 60 mV 水平的霍尔电压，并将其与约瑟夫森电压进行比较。电流放大器的增益用低温电流比较器电桥校准。对于两种不同的驱动频率和重复的热循环，比较表明在第一个平台上平均泵浦电流等于ef在 0.3 10 ^-6 ( k = 1)的组合不确定度水平内。