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Microwave SQUID multiplexer
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10.1063/1.1791733
/content/aip/journal/apl/85/11/10.1063/1.1791733
http://aip.metastore.ingenta.com/content/aip/journal/apl/85/11/10.1063/1.1791733
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Circuit for microwave reflectometer readout of a single SQUID. (b) Reflected , microwave signal from a dc SQUID as a function of flux bias. Curves have different dc bias currents, listed in units of . The “x” marks the bias point at which the noise spectrum in (c) is taken. (c) SQUID flux noise. A calibration signal is injected into the flux line. The other lines are harmonics of and harmonics of injected by the mixer. The low-frequency noise is introduced by inadequate shielding of the HEMT bias circuit.

Image of FIG. 2.
FIG. 2.

Resonant circuit for multiplexed readout of two SQUID pixels.

Image of FIG. 3.
FIG. 3.

Differential measurement of the scattering of a microwave signal off the circuit in Fig. 2, relative to the signal when the SQUIDs are off. Data are shown as a function of frequency. (a) A family of curves for different flux in SQUID 1. (b) A family of curves for different flux in SQUID 2. The small crosstalk is due to flux signal crosstalk on the inputs of the two SQUIDs.

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/content/aip/journal/apl/85/11/10.1063/1.1791733
2004-09-17
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Microwave SQUID multiplexer
http://aip.metastore.ingenta.com/content/aip/journal/apl/85/11/10.1063/1.1791733
10.1063/1.1791733
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