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| SQE-DC-BR-400k
SQUID readout circuit
with bias reversal, and
control box with built-in rechargable battery. |
|
| Our dc SQUID readout circuits SQE-DC-100k and SQE-DC-400k are also
available with bias-reversal modulation. Bias reversal will suppress
low-frequency excess noise produced by critical current fluctuations, and
is especially helpful when reading out high-temperature superconductor
SQUIDs. 1/f noise produced by critical current fluctuations can also
be a problem in LTS SQUIDs when magnetic fields at very low frequencies
(mHz) have to be measured. |
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