Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

IEICE Transactions on Electronics

High-T_c Superconducting Quantum Interference Device with Additional Positive Feedback

Akira Adachi, Kenichi Okajima, Youichi Takada, Saburo Tanaka, Hideo Itozaki, Haruhisa Toyoda, Hisashi Kado

Published May 25, 1995• 1 citation
OpenAlex

Related papers

Evaluation of High-Tc Superconducting Quantum Interference Device with Alternating Current Bias DOIT and Additional Positive Feedback

Akira Adachi

IEICE Transactions on Electronics•Oct 25, 1997•0 citations

Flux Feedback Amplifier based on Superconducting Quantum Interference Device

Yongliang Wang, Guofeng Zhang, Xiaofeng Xu +4 more

Physica C Superconductivity•Jul 29, 2019•2 citations

Noise Characteristics of dc Superconducting Quantum Interference Device with Additional Positive Feedback

Youichi Takada, Gen Uehara Kado

We investigated the flux noise characteristics of a superconducting quantum interference device (SQUID) with additional positive feedback (APF) by comparing calculated results with experimental results. Equations for the minimum flux noise of a SQUID with APF and the optimum condition of APF gain (βa) are deduced. We examined the relationship of flux noise versus βaand experimentally confirmed that it has a minimum point. The deduced equations agree well with experimental results. From the viewpoint of total flux noise of SQUID, it is useful to employ the APF technique for a low-intrinsic-noise SQUID, but not for a high-intrinsic-noise SQUID.

Japanese Journal of Applied Physics•Dec 1, 1994•3 citations

a Low Noise High Temperature Superconducting Quantum Interference Device

A. B. Berezin

•Jan 1, 1993•0 citations

Superconductive quantum interference device

Gen Uehara, Masanori Higuchi

OYOBUTURI•Jan 1, 1997•0 citations

Superconducting Quantum Interference Device Voltage Swing Related to Additional Positive Feedback Parameters

Youichi Takada, Gen Uehara, Naoki Matsuda Kado

The relationship between superconducting quantum interference device (SQUID) voltage swing and additional positive feedback (APF) parameters has been investigated. Voltage swing is depressed as APF gain increases. In a symmetric-bias-injection SQUID, the voltage depression can be explained by the voltage divider action of APF resistance and the SQUID dynamic resistance. On the other hand, the voltage depression in an asymmetric-bias-injection SQUID is expressed as the effect of the voltage divider action multiplied by the effect of thermal noise of APF resistance. These two effects should be considered when designing SQUIDs with an APF.

Japanese Journal of Applied Physics•Nov 1, 1994•3 citations
We investigated the flux noise characteristics of a superconducting quantum interference device (SQUID) with additional positive feedback (APF) by comparing calculated results with experimental results. Equations for the minimum flux noise of a SQUID with APF and the optimum condition of APF gain (βa) are deduced. We examined the relationship of flux noise versus βaand experimentally confirmed that it has a minimum point. The deduced equations agree well with experimental results. From the viewpoint of total flux noise of SQUID, it is useful to employ the APF technique for a low-intrinsic-noise SQUID, but not for a high-intrinsic-noise SQUID.
The relationship between superconducting quantum interference device (SQUID) voltage swing and additional positive feedback (APF) parameters has been investigated. Voltage swing is depressed as APF gain increases. In a symmetric-bias-injection SQUID, the voltage depression can be explained by the voltage divider action of APF resistance and the SQUID dynamic resistance. On the other hand, the voltage depression in an asymmetric-bias-injection SQUID is expressed as the effect of the voltage divider action multiplied by the effect of thermal noise of APF resistance. These two effects should be considered when designing SQUIDs with an APF.