Autors: Mladenov, V. M.
Title: RSFQ DC to SFQ Converter with Reduced Josephson Current Density
Keywords: Superconductivity, Rapid Single-Flux Quantum (RSFQ) electron

Abstract: In this paper we consider the Rapid Single-Flux Quantum (RSFQ) circuits with reduced Josephson current density and especially deal with one of the basic building blocks of these electronics - the DC to SFQ converter. For future promising RSFQ applications the critical current of the Josephson junctions should be reduced (by reduction of Josephson current density) to several µA, resulting into values of the interferometer’s inductance of several hundreds of pH. Such large inductances cannot be efficiently realized and we utilize an approach for substitution of inductances by arrays of classical Josephson junctions operating in nonswitching mode. We investigate the classical DC to SFQ converter and based on the utilized approach we design a new schematic with reduced Josephson current density. The circuit is optimized with respect to yield and fabrication margins of the design parameters.

References

    Issue

    Proceedings of 11th WSEAS Conference on CIRCUITS, pp. 217-221, 2007, Greece,

    Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Web of Science