Title :
Experimental study of the RSFQ logic elements
Author :
Kaplunenko, V.K. ; Khabipov, M.I. ; Koshelets, V.P. ; Likharev, Konstantin K. ; Mukhanov, O.A. ; Semenov, V.K. ; Serpuchenko, I.L. ; Vystavkin, A.N.
Author_Institution :
Inst. of Radio Eng. & Electron., Acad. of Sci., Moscow, USSR
fDate :
3/1/1989 12:00:00 AM
Abstract :
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
Keywords :
flip-flops; superconducting logic circuits; 14-layer technology; 5 micron; 50 to 120 GHz; Nb; T-flip-flop circuit; clock frequencies; externally shunted tunnel junctions; input convertors; output convertors; rapid single flux quantum logic elements; Circuit testing; Clocks; Equivalent circuits; Flip-flops; Frequency; Josephson junctions; Logic testing; Pulse circuits; Pulse generation; Superconducting transmission lines;
Journal_Title :
Magnetics, IEEE Transactions on
