IEICE Transactions on Electronics
Online ISSN : 1745-1353
Print ISSN : 0916-8524
Special Section on SQUID & its Applications
Novel Superconducting Quantum Interference Device Bootstrap Circuit and Its Application in Biomagnetism
Xiangyan KONG, Yi ZHANG, Xiaoming XIE, Mianheng JIANG
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Keywords: SQUID bootstrap circuit (SBC), SQUID readout electronics, SQUID noise, biomagnetic measurement
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2013 Volume E96.C Issue 3 Pages 320-325

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Abstract

The voltage biased SQUID Bootstrap Circuit (SBC) was recently demonstrated for direct readout of SQUID signals. The SBC combines current- and voltage-feedbacks in one circuit to suppress the preamplifier noise. It offers not only a good noise performance, but also wide tolerance of SQUID parameters. Using SBC gradiometer, the bio-magnetic signals were successfully measured. In this paper, we overview the concept of SBC and its applications.

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© 2013 The Institute of Electronics, Information and Communication Engineers
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