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We investigated current–voltage characteristics of unshunted and externally shunted Josephson junctions (JJs) with high critical current densities Jc in order to extract their basic parameters and statistical characteristics for JJ modeling in superconducting integrated circuits as well as to assess their potential for future technology nodes. Nb/AlOx-Al/Nb junctions with diameters from 0.5 to 6 μm...