Bae, Myung-Ho Chae, Dong-Hun Kim, Mun-Seog Kim, Bum-Kyu Park, Suk-In Song, Jindong Oe, Takehiko Kaneko, Nobu-Hisa Kim, Nam Kim, Wan-Seop 2024-01-19T16:02:45Z 2024-01-19T16:02:45Z 2021-09-02 2020-12 0026-1394 https://pubs.kist.re.kr/handle/201004/117790 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 10(3) to induce a Hall voltage of about 60 mV level across a 1 M omega 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 x 10(-6) (k = 1). English IOP PUBLISHING LTD QUANTUM METROLOGY NOISE Precision measurement of single-electron current with quantized Hall array resistance and Josephson voltage Article 10.1088/1681-7575/abb6cf 1 METROLOGIA, v.57, no.6 METROLOGIA 57 6 scie scopus 000587021300001 2-s2.0-85095965029 Instruments & Instrumentation Physics, Applied Instruments & Instrumentation Physics Article QUANTUM METROLOGY NOISE quantum current source single electron pump precision measurement of current