New AC-Powered SFQ Digital Circuits

Static Simulation of CNTFET-based Digital Circuits

   In this paper we implement a simple DC model for CNTFETs already proposed by us in order to carry out static analysis of basic digital circuits. To verify the validity of the obtained results, they are compared with those of Wong model, resulting in good agreement, but obtaining a lighter ensuring compile and shorter execution time, which are the main character...

Improvement of Time Resolution of the Double-Oscillator Time-to-Digital Converter using SFQ Circuits

Demonstration of an optical interface for SFQ logic circuits

Single-flux-quantum (SFQ) logic circuits are expected to be operative at a clock rate above 100GHz with very low power consumption. A considerable amount of research has been performed on this topic, and noteworthy achievements, e. g. 120 GHz shift register [1] and microprocessor consists of over 10,000 junctions [2], have been reported recently. With the progress of the performance of SFQ circ...

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...

AC Circuits with Transformers