New phase-mode logic gates with large operating regions of circuit parameters

We propose new phase-mode logic gates with large operating regions of circuit perimeters. In the phase-mode logic, logic circuits are realized by combination of ICF (INHIBIT controlled by fluxon) gates. The function of the ICF gate can be achieved by the two gates which are an INHIBIT gate and an AND gate. These two gates are fabricated by NEC 2.5 kA/cm/sup 2/ Nb/AlOx/Nb standard process and successfully demonstrated. A Monte-Carlo calculation is used for evaluating yields of the gates. From 1000 calculations for each gates, we show that each yield of the INHIBIT gate and the AND gate does not decrease with increasing /spl sigma/=7% and /spl sigma/=9% which are the standard deviations of the parameter spreads. A realization of high-reliability LSI circuits will be expected by using these gates.