Amplification by a voltage locked array of Josephson junctions

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.96116· OSTI ID:5422049

McDonald, D G; Frederick, N V

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.

• Research Organization: National Bureau of Standards, Boulder, Colorado 80303
• OSTI ID: 5422049
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 47:5; 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
CRITICAL CURRENT
CURRENTS
DATA
DESIGN
ELECTRIC CURRENTS
ELECTRIC IMPEDANCE
ELECTRIC POTENTIAL
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FREQUENCY RANGE
GAIN
GHZ RANGE
GHZ RANGE 01-100
IMPEDANCE
INFORMATION
JOSEPHSON JUNCTIONS
JUNCTIONS
MODE LOCKING
NUMERICAL DATA
PERFORMANCE
SUPERCONDUCTING JUNCTIONS