Flux-flow-type josephson linear amplifier with large gain and wide linear range

Tadao Nagatsuma, Keiji Enpuku, Hiroaki Iwakura, Keiji Yoshida

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


A linear amplifier using a flux-flow phenomenon in a long Josephson junction has been designed and tested by connecting a load resistance. The present experiment has demonstrated that a current gain of 500/Ws (1/pm) is obtained for the load resistance of 9 mft when an input signal is applied with a control line of width Ws (jum). An equivalent circuit of the amplifier has also been presented, which shows that the device is most suitable for current amplification with large gain in low impedance circuits.

Original languageEnglish
Pages (from-to)L599-L601
JournalJapanese journal of applied physics
Issue number8
Publication statusPublished - Aug 1985

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


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