High-Resolution Digital SQUID Magnetometer using Sub-Flux Quantum Feedback

Digital SQUIDs with the single flux quantum (SFQ) feedback have attracted much attention because of the feasibility of realizing a wide dynamic range and high slew rate for digital magnetometers. In order to realize higher resolution, we have studied a digital SQUID with sub-flux quantum feedback. C...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1559; no. 1; pp. 12013 - 12018
Main Authors Myoren, Hiroaki, Okabe, Kosuke, Matsunawa, Ryo, Itagaki, Kohki, Naruse, Masato, Taino, Tohru
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.06.2020
Subjects
Feedback loops
Physics
Slew rate
Superconducting quantum interference devices
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Summary:Digital SQUIDs with the single flux quantum (SFQ) feedback have attracted much attention because of the feasibility of realizing a wide dynamic range and high slew rate for digital magnetometers. In order to realize higher resolution, we have studied a digital SQUID with sub-flux quantum feedback. Combining the sub-flux quantum feedback to a feedback loop and the direct SFQ feedback to a main loop triggered by carry SFQ pulses from an up/down counter. In this study, we discuss the method of multi-flux quantum generation and compact design of the SFQ up/down counter for high-speed operation of the digital SQUID magnetometer.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1559/1/012013