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Single superconducting quantum interference device multiplexer for arrays of low-temperature sensors
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6.We neglect the current noise in the SQUID loop. This is a good approximation for the parameters of interest in this letter, but not necessarily appropriate under all circumstances, particularly at higher frequencies.
7. is not defined by the minimization process, but plays little role if it is much less than For convenience, we choose We used a Quantum Design series 50 dc SQUID with and and Model 5000 dc SQUID controller.
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11.The noise of the oscillator used for the bias is smaller by a factor ∼10 than the noise of a VSB, for (Ref. 15). Here, and are the spectral densities characterizing the voltage noise of the oscillator and current noise of a VSB. for is the rms voltage amplitude from the oscillator, and is the current through the VSB, respectively.
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