Ultrafast analog to digital converters
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United States of America Patent
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Aug 8, 1989
Grant Date -
N/A
app pub date -
Aug 24, 1988
filing date -
Aug 25, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ultrafast analog to digital converter is provided which uses Josephson devices. The converter has a plurality of Josephson junction interferometers. The output of each interferometer is a bit that forms part of a digital representation of a sampled analog signal. Each of the interferometers has an offset, with each offset being different. The bits output by the interferometers are weighted by the offsetting. The weighting of bits by offsetting rather than periodicity allows the use of interferometers which do not need to maintain periodicity over a great number of periods, and can therefore have lower internal inductance and better high speed properties.
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