Amplification by a voltage locked array of Josephson junctions
- 1 September 1985
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 47 (5) , 530-532
- https://doi.org/10.1063/1.96116
Abstract
We have studied a new type of Josephson junction amplifier which is based on a two-junction array; the junctions are mutually phase locked at the Josephson self-oscillation frequency. With this frequency at 82 GHz, the voltages of the junctions remain equal (locked) for a bias current range as large as 60% of the critical current. Over a much smaller bias range, with an applied signal frequency of 1 kHz, a small-signal power gain of 19 dB was measured, accompanied by a negative resistance input impedance. This performance is consistent with a quasistatic theory of the amplifier.Keywords
This publication has 8 references indexed in Scilit:
- Amplification by the phase-locking mechanism in a four-junction SQUIDApplied Physics Letters, 1984
- Mutual phase-locking in Josephson junction arraysPhysics Reports, 1984
- Power gain of a SQUID amplifierApplied Physics Letters, 1984
- Numerical and analytical studies of mutual locking of Josephson tunnel junctionsJournal of Applied Physics, 1984
- Fabrication Process for Josephson Integrated CircuitsIBM Journal of Research and Development, 1980
- Voltage locking in two coupled microbridge Josephson junctionsIEEE Transactions on Magnetics, 1977
- rf impedance of superconducting weak linksJournal of Applied Physics, 1973
- Josephson Currents in Superconducting Tunneling: The Effect of Microwaves and Other ObservationsPhysical Review Letters, 1963