Title :
Direct determination of the ultimate performance of the RSFQ digital devices and single flux quantum voltage amplifiers
Author :
Goldobin, E.B. ; Golomidov, V.M. ; Kaplunenko, V.K. ; Khabipov, M.I. ; Khokhlov, D.Yu. ; Kidiyarova-Shevchenko, A.Yu.
Author_Institution :
Inst. of Radio Eng. & Electron., Acad. of Sci., Moscow, Russia
fDate :
3/1/1993 12:00:00 AM
Abstract :
The fault-free switching of single-flux-quantum (SFQ) elements was studied by investigating SFQ pulse propagation in a ring Josephson transmission line closed with an SFQ inverter. A lifetime of more than a few hours was obtained that corresponds to at least 10/sup 15/ fault-free switching. The completely DC-powered rapid SFQ (RSFQ) sampler was used to directly measure the repetition rate stability of a Josephson generator loaded by a uniformly shunted transmission line. A stable repetition rate up to 7 GHz was obtained. The authors also report experimental results for two-stage serial and five-stage parallel quasi-digital amplifiers. The precision calculation of the input SFQ pulses is the main idea of these circuits.<>
Keywords :
Josephson effect; amplifiers; digital circuits; electron device testing; superconducting junction devices; switching; 7 GHz; DC-powered; Josephson generator; RSFQ digital devices; SFQ inverter; SFQ pulse propagation; fault-free switching; five-stage parallel type; loaded generator; quasi-digital amplifiers; rapid SFQ sampler; repetition rate stability; ring Josephson transmission line; single flux quantum; two-stage serial type; uniformly shunted transmission line; voltage amplifiers; Circuit faults; Digital circuits; Distributed parameter circuits; Frequency; Josephson junctions; Power transmission lines; Superconducting transmission lines; Switching circuits; Testing; Transmission line measurements;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
