Time characteristics of a Josephson-balanced comparator

We consider the time characteristics of a balanced comparator formed by two Josephson junctions connected in series. Such a decision-making junction pair is an essential component of all RSFQ cells. The analysis is performed within the framework of a simple time-dependent oscillator model. Turn-on d...

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Bibliographic Details
Published inSuperconductor science & technology Vol. 12; no. 11; pp. 776 - 778
Main Authors Filippov, T, Znosko, M
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.11.1999
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Summary:We consider the time characteristics of a balanced comparator formed by two Josephson junctions connected in series. Such a decision-making junction pair is an essential component of all RSFQ cells. The analysis is performed within the framework of a simple time-dependent oscillator model. Turn-on delay and uncertainty (jitter) of comparator switching times are analysed taking into account the influence of thermal fluctuations and the finite time duration of clock pulse. Restrictions on speed performance of RSFQ cells caused by both times are considered. Some practical recommendations on the clock frequency increase are also discussed.
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ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/12/11/325