Figure 1
From: Reversibility and energy dissipation in adiabatic superconductor logic

Schematic of the RQFP gate. The gate is composed of six AQFP gates, which are represented by the white boxes. The three gates (A–C) work as three-output SPL gates and the others (X–Z) work as three-input MAJ gates. a, b, c are input data and x, y, z are output data. The RQFP gate is logically reversible and symmetrical in terms of circuit schematic. J 1 = J 2 = 50 μA, L 1 = L 2 = 1.32 pH, L in = L out = L wire = 10.5 pH, k = 0.4. The Josephson junctions are underdamped without shunt resistors. Invert functions were achieved by changing the polarity of the coupling coefficient, k.