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Experimental study of the RSFQ logic elements

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8 Author(s)
V. K. Kaplunenko ; Inst. of Radio Eng. & Electron., Acad. of Sci., Moscow, USSR ; M. I. Khabipov ; V. P. Koshelets ; K. K. Likharev
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New elements of the rapid single flux quantum (RSFQ) logic family have been designed, fabricated, and tested. All-Nb 14-layer 5 μm technology using externally shunted tunnel junctions with jc=500 A/cm2, IcR s=300 μV, and Bc⩽1 has been used. The T-flip-flop circuit has been demonstrated to operate with ±30% margins at clock frequencies below 50 GHz and with at least ±10% margins at frequencies up to 120 GHz. Operation of the input (DC/SFQ) and output (SFQ/DC) converters ±40% margins is also demonstrated

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IEEE Transactions on Magnetics  (Volume:25 ,  Issue: 2 )