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Time jitter measurement in a circular Josephson transmission line

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2 Author(s)
Kaplunenko, V. ; Conductus Inc., Sunnyvale, CA, USA ; Borzenets, V.

A Josephson transmission line closed to form a ring was used to measure the time jitter produced by a single shunted Josephson junction. A toggle flip-flop cell was connected to a sampling oscilloscope, and was used to detect the flux quantum arrival time. Time jitter was determined from the variation of this time. The jitter was measured as a function of the number of cycles the flux quantum made in the ring. The reduced jitter produced by a single junction of 0.2 ps√n (n-number of junctions passed by the quantum) was measured using Hypres 1 kA/cm 2 chip fabrication technology. It was found that jitter varies the distance between the quanta with the same rate of 0.2 ps√n

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:11 ,  Issue: 1 )