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Title: Power gain of a SQUID amplifier

Abstract

The power gain of a dc superconducting quantum interference device (SQUID) amplifier, with tuned input and output circuits, is computed as a function of the current and magnetic biases. A gain of 20300 is found at 1.5 GHz and 3470 at 3.0 GHz, implying a frequency dependence to the gain of approximately ..omega../sup -2/. The gain, as derived from the resistively shunted junction model, is compared with the gain of a simplified model based on the dc magnetic response V/sub phi/. This comparison shows that the V/sub phi/ description of the SQUID can lead to large errors.

Authors:
Publication Date:
Research Org.:
National Bureau of Standards, Boulder, Colorado 80303
OSTI Identifier:
5221121
Resource Type:
Journal Article
Journal Name:
Appl. Phys. Lett.; (United States)
Additional Journal Information:
Journal Volume: 44:5
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DC AMPLIFIERS; GAIN; SQUID DEVICES; FREQUENCY DEPENDENCE; GHZ RANGE 01-100; POWER; AMPLIFICATION; AMPLIFIERS; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; FREQUENCY RANGE; GHZ RANGE; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; SUPERCONDUCTING DEVICES; 420201* - Engineering- Cryogenic Equipment & Devices

Citation Formats

McDonald, D G. Power gain of a SQUID amplifier. United States: N. p., 1984. Web. doi:10.1063/1.94801.
McDonald, D G. Power gain of a SQUID amplifier. United States. https://doi.org/10.1063/1.94801
McDonald, D G. Thu . "Power gain of a SQUID amplifier". United States. https://doi.org/10.1063/1.94801.
@article{osti_5221121,
title = {Power gain of a SQUID amplifier},
author = {McDonald, D G},
abstractNote = {The power gain of a dc superconducting quantum interference device (SQUID) amplifier, with tuned input and output circuits, is computed as a function of the current and magnetic biases. A gain of 20300 is found at 1.5 GHz and 3470 at 3.0 GHz, implying a frequency dependence to the gain of approximately ..omega../sup -2/. The gain, as derived from the resistively shunted junction model, is compared with the gain of a simplified model based on the dc magnetic response V/sub phi/. This comparison shows that the V/sub phi/ description of the SQUID can lead to large errors.},
doi = {10.1063/1.94801},
url = {https://www.osti.gov/biblio/5221121}, journal = {Appl. Phys. Lett.; (United States)},
number = ,
volume = 44:5,
place = {United States},
year = {1984},
month = {3}
}