Digital programmable frequency divider

Details Digital programmable frequency divider Digital programmable frequency divider

2007-11-21

2009-06-30

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C327S118000, C327S119000

Reexamination Certificate

active

07554369

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), 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 2Nstates 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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patent: 6781435 (2004-08-01), Gupta et al.
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B. Gilbert, “A Precise Four Quadrant Multiplexer With Subnanosecond Response,” IEEE, vol. SC-3, pp. 365-373, Dec. 1968.

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