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JVS & DC Current, Voltage & Resistance Standards

Josephson Voltage Standard and DC Current, Voltage & Resistance Standards

An automatic 10V Josephson Series Array Voltage Standard (JSAVS) was integrated, characterized and established for the calibration of Zener reference standard which is the secondary standard of DC voltage. This system works at microwave frequency of 76 GHz. The expanded uncertainty of Zener reference standard calibration at 10V is ± 350 nV at k=2 Figure 2.2 and 2.3 show the block diagram and photograph of the automatic 10V JSAVS. The inset in the photographs shows the dc characteristics and the constant voltage steps (Shapiro steps).