Stable Josephson reference voltages between 0.1 and 1.3 V for high-precision voltage standards

Niemeyer, J.; Grimm, L.; Meier, W.; Hinken, J. H.; Vollmer, E.
December 1985
Applied Physics Letters;12/1/1985, Vol. 47 Issue 11, p1222
Academic Journal
A new series array of 1440 Josephson tunnel junctions has been developed and tested as a reference voltage standard. It yields microwave induced quantized voltage steps up to 1.3 V. The steps are usually stable for more than 5 h with a microwave driving frequency of either 70 or 90 GHz. A high-resolution comparison of a constant voltage step at the 1-V level with the electromotive force of a saturated Weston cell is described. The comparison shows that the step voltage is constant to within ±1 nV over the full step width.


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