Evaluation of High-Tc Superconducting Quantum Interference Device with Alternating Current Bias DOIT and Additional Positive Feedback
Summary :
This study shows the results of evaluating the flux noises at low frequency when the alternating current(AC) bias direct offset integrated technique(DOIT) with additional positive feedback (APF) is used in a high-Tc dc superconducting quantum interference device (SQUID). The AC-bias DOIT can reduce low-frequency noise without increasing the level of white noise because each operating point in the two voltage-flux characteristics with AC bias can always be optimum on the magnetometer in the high-Tc dc-SQUID. APF can improve the effective flux-to-voltage transfer function so that it can reduce the equivalent flux noise due to the voltage noise of the preamplifier in the magnetometer. The use of APF combined with the AC-bias DOIT reduced the noise of the magnetometer by factors of 1.5 (33µΦ0/
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E80-C No.10 pp.1252-1257
- Publication Date
- 1997/10/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section PAPER (Special Issue on Basic Properties and Applications of Superconductive Electron Devices)
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Akira ADACHI, "Evaluation of High-Tc Superconducting Quantum Interference Device with Alternating Current Bias DOIT and Additional Positive Feedback" in IEICE TRANSACTIONS on Electronics,
vol. E80-C, no. 10, pp. 1252-1257, October 1997, doi: .
Abstract: This study shows the results of evaluating the flux noises at low frequency when the alternating current(AC) bias direct offset integrated technique(DOIT) with additional positive feedback (APF) is used in a high-Tc dc superconducting quantum interference device (SQUID). The AC-bias DOIT can reduce low-frequency noise without increasing the level of white noise because each operating point in the two voltage-flux characteristics with AC bias can always be optimum on the magnetometer in the high-Tc dc-SQUID. APF can improve the effective flux-to-voltage transfer function so that it can reduce the equivalent flux noise due to the voltage noise of the preamplifier in the magnetometer. The use of APF combined with the AC-bias DOIT reduced the noise of the magnetometer by factors of 1.5 (33µΦ0/
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e80-c_10_1252/_p
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@ARTICLE{e80-c_10_1252,
author={Akira ADACHI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Evaluation of High-Tc Superconducting Quantum Interference Device with Alternating Current Bias DOIT and Additional Positive Feedback},
year={1997},
volume={E80-C},
number={10},
pages={1252-1257},
abstract={This study shows the results of evaluating the flux noises at low frequency when the alternating current(AC) bias direct offset integrated technique(DOIT) with additional positive feedback (APF) is used in a high-Tc dc superconducting quantum interference device (SQUID). The AC-bias DOIT can reduce low-frequency noise without increasing the level of white noise because each operating point in the two voltage-flux characteristics with AC bias can always be optimum on the magnetometer in the high-Tc dc-SQUID. APF can improve the effective flux-to-voltage transfer function so that it can reduce the equivalent flux noise due to the voltage noise of the preamplifier in the magnetometer. The use of APF combined with the AC-bias DOIT reduced the noise of the magnetometer by factors of 1.5 (33µΦ0/
keywords={},
doi={},
ISSN={},
month={October},}
Copy
TY - JOUR
TI - Evaluation of High-Tc Superconducting Quantum Interference Device with Alternating Current Bias DOIT and Additional Positive Feedback
T2 - IEICE TRANSACTIONS on Electronics
SP - 1252
EP - 1257
AU - Akira ADACHI
PY - 1997
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E80-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 1997
AB - This study shows the results of evaluating the flux noises at low frequency when the alternating current(AC) bias direct offset integrated technique(DOIT) with additional positive feedback (APF) is used in a high-Tc dc superconducting quantum interference device (SQUID). The AC-bias DOIT can reduce low-frequency noise without increasing the level of white noise because each operating point in the two voltage-flux characteristics with AC bias can always be optimum on the magnetometer in the high-Tc dc-SQUID. APF can improve the effective flux-to-voltage transfer function so that it can reduce the equivalent flux noise due to the voltage noise of the preamplifier in the magnetometer. The use of APF combined with the AC-bias DOIT reduced the noise of the magnetometer by factors of 1.5 (33µΦ0/
ER -
English
