Cryotronics is the production of electronics that utilize superconductivity. The simplest use of cryotronics is the cryotron, which is a switch. Rapid single flux quantum digital electronics technology is a good example of cryotronics, as it is based on superconductors. Additionally, the sensitive amplifiers used in radio telescopes are cooled using liquid helium to reduce thermal noise. Cryotronics includes creating:

  1. Supersensitive miniature receivers for detecting weak radio signals.
  2. A cryotron switch depends on the effect of inducing persistent current in a closed superconducting circuit for eg.ring