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by Ciro Santilli (@cirosantilli, 25)
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Josephson voltage standard

 wiki
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The most practical/precise volt standard.
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It motivated the definition of the ampere in the 2019 redefinition of the SI base units
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Quick NIST article about it: www.nist.gov/news-events/news/2013/04/primary-voltage-standard-whole-world (archive)
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The wiki page en.wikipedia.org/wiki/Josephson_voltage_standard contains amazing schematics of the device, apparently made by the US Government.
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Figure 1. Source.

 Ancestors

  1. Applications of Josephson Junctions
  2. Josephson effect
  3. Superconductivity
  4. Electrical resistivity and conductivity
  5. Condensed matter physics
  6. Physics
  7. Natural science
  8. Science
  9. Index

 Incoming links

  • Applications of Josephson Junctions
  • Inverse AC Josephson effect

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