Subharmonic Josephson relaxation oscillator: amplification and locking

Journal Article · Tue Sep 15 00:00:00 EDT 1981 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.92782· OSTI ID:6227952

Calander, N; Claeson, T; Rudner, S

The inductance of the shunt loop in a resistively shunted Josephson tunnel junction may cause relaxation oscillations at subharmonics of the Josephson frequency. The relaxation period, the injection locking to a subharmonic of a strong external signal, and the amplification of weak signals were studied in detail. Gains up to 15 dB were achieved, but the noise temperature, which depended upon the harmonic of the relaxation frequency at which the amplification occurred, was high.

• Research Organization: Physics Department, Chalmers University of Technology S 412 96 Gothenburg, Sweden
• OSTI ID: 6227952
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 39:6; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
AMPLIFIERS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FREQUENCY DEPENDENCE
GAIN
HARMONICS
INFORMATION
JOSEPHSON JUNCTIONS
JUNCTIONS
MATHEMATICAL MODELS
NUMERICAL DATA
OSCILLATIONS
OSCILLATORS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT