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The prospects of operating rapid single flux quantum (RSFQ) circuits with high-Tc superconductive materials have been studied quantitatively by means of numerical inductance computations. To enable error-free operation of such circuits at a desired operating temperature, a certain energy ratio of Josephson coupling to thermal fluctuations has to be maintained (K. Likharev, V. Semenov (1991)). This has to be accomplished by increasing the critical current of the Josephson junctions with the operation temperature. However, as the operation is essentially dependent on a fixed product of critical current and loop inductance, this will cause the necessity of a proportional decrease of the inductances. As has been pointed out earlier (K. Likharev (1996)), not all technological approaches are well-suited for meeting these requirements. As will be illustrated in the contribution, inductance calculations for typical layout arrangements will provide insight in upper limits for the feasible operating temperature ranges.