PROJECT TITLE :

Majority-Logic-Optimized Parallel Prefix Carry Look-Ahead Adder Families Using Adiabatic Quantum-Flux-Parametron Logic - 2017

ABSTRACT:

Superconductor-based adiabatic quantum-flux-parametron (AQFP) logic holds tremendous promise toward building extraordinarily energy economical computing systems with bit energies approaching a hundred kB T. The majority logic gate is the idea for the way all AQFP logic gates are created. By reconsidering the logic design approach of digital circuits using majority logic instead of standard AND/OR/NOT logic, circuits can probably use fewer gates overall. This could cause lower circuit complexities in terms of Josephson junctions, and in turn lower power consumption also lower latencies. As a first step toward exploiting majority logic in AQFP technology, we tend to explore how majority-logic-optimized designs of the Kogge-Stone and Brent-Kung adder architectures scale in terms of complexity, latency, space, and energy/operation as we increase the information word size from eight to 64 bit. Next, we have a tendency to implement eight-bit prototypes of both adders for experimental demonstration. The styles are fabricated using the two.5 kA/cm a pair of AIST commonplace process a pair of and have demonstrated successful operation in low-frequency testing. Both adders include ~a thousand Josephson junctions and are designed for 5 GHz operation with a 5-cycle latency.