Abstract
The AC-DC transfer difference due to thermoelectric effects in a thermal converter was evaluated using a NbN/TiN/NbN Josephson junction array as an ultra-stable fast-reversed DC (FRDC) source. The Josephson junction array was connected in parallel with a conventional semiconductor FRDC current source, as an add-on voltage-stabilizer for the input of the thermal converter. The AC-DC difference due to thermoelectric effects was evaluated with a standard measurement (type-A) uncertainty of the order of 0.01 /spl mu/V/V, four-times better than that with the conventional semiconductor FRDC source.
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