Digital programmable frequency divider
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United States of America Patent
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Issued Date -
Apr 5, 2007
app pub date -
Oct 4, 2005
filing date -
Oct 4, 2005
priority date (Note) -
Abandoned
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Abstract
A digital programmable frequency divider is constructed of Rapid Single Flux Quantum (RSFQ) logic elements. The logic elements may include an RSFQ non-destructive readout cell (NDRO), and RSFQ D flip-flop and an RSFQ T flip-flop. A digital word comprising N bits is used to control the amount of frequency division and the frequency divider selectively imparts a respective frequency division for any of 2.sup.N states that can be represented by the digital word. The RSFQ logic elements utilize Josephson junctions which operate in superconducting temperature domains.
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