By Topic

Wide Dynamic Range Analog FLL System Using High- T_{c} SQUID for Biomagnetic Measurements

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Kobayashi, K. ; Fac. of Eng., Iwate Univ., Morioka, Japan ; Yoshizawa, M. ; Uchikawa, Y.

In a system that can perform biomagnetic measurements, the most eagerly desired features include without liquid helium, unshielded operation, and low cost. We developed a high-critical-temperature (high-Tc) superconducting quantum interference device (SQUID) system to be used for taking biomagnetic measurements. The proposed device consists of a small cryostat, high-Tc SQUID magnetometer, and analog flux-locked loop (FLL) circuit. A wide dynamic range was achieved through an analog FLL circuit that used the flux quanta counting (FQC) method. We also proved the feasibility of this high-Tc SQUID system with the help of a simple prototype. The circuit performance of the analog FLL circuit was evaluated using a high-Tc SQUID. A wide dynamic range was obtained by using the analog FLL circuit.

Published in:

Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 10 )