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Microstrip direct current superconducting quantum interference device radio frequency amplifier: Noise data
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10.1063/1.3702825
/content/aip/journal/apl/100/15/10.1063/1.3702825
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/15/10.1063/1.3702825
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Gain and noise temperature of a MSA operated at three different frequencies (150 MHz, 250 MHz, and 350 MHz) as a function of the bias current Ib in the SQUID. The flux bias was optimized for lowest noise temperature for each data point taken.

Image of FIG. 2.
FIG. 2.

Gain and noise temperature of a MSA operated at 1.7 GHz as a function of the bias current Ib in the SQUID. The flux bias was optimized for lowest noise temperature for each data point taken.

Image of FIG. 3.
FIG. 3.

Gain and noise ratio of the MSA shown in Fig. 1 at 350 MHz as a function of static bias flux Φb, measured with a bias current in the SQUID of12 μA.

Image of FIG. 4.
FIG. 4.

Gain and noise ratio of a MSA as a function of static bias flux Φb, measured at 250 MHz with a bias current in the SQUID of 11 μA. Inset shows sketch of static flux-voltage transfer function of SQUID; for clarity, the nonsinusoidal sections are exaggerated. The arrows show points of reduced ∂V/∂Φ, leading to a lower gain and higher noise at these bias points.

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/content/aip/journal/apl/100/15/10.1063/1.3702825
2012-04-09
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Microstrip direct current superconducting quantum interference device radio frequency amplifier: Noise data
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/15/10.1063/1.3702825
10.1063/1.3702825
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