Automatic Single-Flux-Quantum (SFQ) Logic Synthesis Method for Top-Down Circuit Design

Circuit Description and Design Flow of Superconducting SFQ Logic Circuits

Superconducting Single-Flux-Quantum (SFQ) devices have been paid much attention as alternative devices for digital circuits, because of their high switching speed and low power consumption. For large-scale circuit design, the role of computer-aided design environment is significant. As the characteristics of the SFQ devices are different from conventional devices, a new design environment is re...

Studies on Design Automation and Arithmetic Circuit Design for Single-Flux-Quantum Digital Circuits

Superconductive single-flux-quantum (SFQ) circuit technology attracts attention as a next generation technology of integrated circuits because of its ultra-fast computation speed and low power consumption. In SFQ digital circuits, unlike CMOS digital circuits, a pulse is used as a carrier of information and the representation of the logic values is different from that in CMOS digital circuits. ...

Comparisons of Synchronous-Clocking SFQ Adders

Recent advances of superconducting single-flux-quantum (SFQ) circuit technology make it attractive to investigate computing systems using SFQ circuits, where arithmetic circuits play important roles. In order to develop excellent SFQ arithmetic circuits, we have to design or select their underlying algorithms, called hardware algorithms, from different point of view than CMOS circuits, because ...

Automatic Logic Circuit Design with Progressive Evolution that Autonomously Gets

The progressive evolution method is a promising way to accelerate learning by making the problem size small in genetic learning. This method leads the population to the final goal by giving step-by-step learning targets, called subgoals. Giving subgoals divides a large search space into a small one, thereby accelerating the evolution. Previous implementation of progressive learning is, however,...

Quantum Approaches to Logic Circuit Synthesis and Testing