Majority-based Design Flow for AQFP Superconducting Family

Adiabatic superconducting devices are promising candidates to develop high-speed/low-power electronics. Advances in physical technology must be matched with a systematic development of comprehensive design and simulation tools to bring superconducting electronics to a commercially viable state. Being the technology fundamentally different from CMOS, new challenges are posed to design automation tools: library cells are controlled by multi-phase clocks, they implement the majority logic function, and they have limited fanout. We present a product-level RTL-to-GDSII flow for the design of Adiabatic Quantum-Flux-Parametron (AQFP) electronic circuits, with a focus on the special techniques used to comply with these challenges. In addition, we demonstrate new optimization opportunities for graph matching, resynthesis, and buffer/splitter insertion, improving the state-of-the-art.