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Timing jitter measurement of single-flux-quantum pulse in Josephson transmission line

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6 Author(s)
Terai, H. ; Kansai Advanced Research Center (KARC), Communications Research Laboratory (CRL), Kobe 651-2492, Japan ; Zhen Wang ; Hishimoto, Yoshihito ; Yorozu, S.
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Timing jitter is an important factor in determining the limit of speed and scale of single-flux-quantum circuits. We estimated the timing jitter by a simple method using 2-bit shift registers. It was estimated by observing the transition between 1- and 2-mode operations while changing the bias current to the clock line. A sharp transition was observed in the shift register with a smaller number of Josephson junctions in the clock and data lines, suggesting the existence of a finite timing jitter. The timing jitter per Josephson junction was estimated to be 0.09 ps at a designed bias current. The temperature dependence supported that the timing jitter comes from thermal fluctuation. © 2004 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:84 ,  Issue: 12 )

Date of Publication:

Mar 2004

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