Journal ArticleDOI
RSFQ logic/memory family: a new Josephson-junction technology for sub-terahertz-clock-frequency digital systems
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TLDR
In this paper, the rapid single-flux-quantum (RSFQ) circuit family is reviewed and a discussion of possible future developments and applications of this novel, ultrafast digital technology is discussed.Abstract:
Recent developments concerning the rapid single-flux-quantum (RSFQ) circuit family are reviewed. Elementary cells in this circuit family can generate, pass, memorize, and reproduce picosecond voltage pulses with a nominally quantized area corresponding to transfer of a single magnetic flux quantum across a Josephson junction. Functionally, each cell can be viewed as a combination of a logic gate and an output latch (register) controlled by clock pulses, which are physically similar to the signal pulses. Hand-shaking style of local exchange by the clock pulses enables one to increase complexity of the LSI RSFQ systems without loss of operating speed. The simplest components of the RSFQ circuitry have been experimentally tested at clock frequencies exceeding 100 GHz, and an increase of the speed beyond 300 GHz is expected as a result of using an up-to-date fabrication technology. This review includes a discussion of possible future developments and applications of this novel, ultrafast digital technology. >read more
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Clock distribution networks in synchronous digital integrated circuits
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Energy-Efficient Single Flux Quantum Technology
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References
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Journal ArticleDOI
Dynamics of Josephson Junctions and Circuits
TL;DR: In this paper, a detailed description of the statistics, dynamics and statics of Josephson junctions is given, with particular emphasis on the dynamics of new circuits and analog and digital devices using single quanta of magnetic flux.
Journal ArticleDOI
High quality refractory Josephson tunnel junctions utilizing thin aluminum layers
TL;DR: In this paper, high quality all-refractory Josephson tunnel junctions based on Nb/Al−oxide−Nb and Nb−Al−Ooxide−Al/Nb structures are reported.