Several fully functional programmable voltage standard chips, each having a total of 32 768 Nb–PdAu–Nb Josephson junctions, have been fabricated and tested. The chips are based on a new design that provides fast programmability (1 μs) between voltages and stable voltage operation from −1 to +1 V. A comparison of the new standard with a conventional Josephson voltage standard is in agreement to 0.5±1.1 parts in 109. We demonstrate the utility of this standard by measuring the linearity of a digital voltmeter.

No abstract

No abstract

No abstract

A comparison of the 10 V Josephson array voltage standard of the Bureau International des Poids et Mesures (BIPM) was made with that of the Measurement Standards Laboratory (MSL), New Zealand, in April 2011. For this exercise, option B of the BIPM.EM-K10.b comparison protocol was applied. This option required the BIPM to provide a reference voltage for measurement by the MSL using its Josephson standard with its own measuring device. The BIPM array is kept floating from ground.The final results are in very good agreement within the combined relative standard uncertainty of 4.0 parts in 1010 for the nominal voltage of 10 V.Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).