DC-squid electronics based on adaptive positive feedback: Experiments

Heikki Seppä, Antti Ahonen, Jukka Knuuttila, Juha Simola, Visa Vilkman

Research output: Contribution to journalArticleScientificpeer-review

33 Citations (Scopus)

Abstract

It is shown that DC-SQUID read-out electronics can be realized utilizing positive feedback without deteriorating the SQUID noise performance. The required gain rise is achieved by interconnecting the SQUID output and a flux modulation coil via a cooled FET acting as a voltage-controlled resistor; different SQUIDs with different types of FETs have been studied experimentally. Possible ways of adaptively controlling the feedback gain produced by the positive feedback are briefly discussed.
Original languageEnglish
Pages (from-to)2488 - 2490
Number of pages3
JournalIEEE Transactions on Magnetics
Volume27
Issue number2
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

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SQUIDs
Electronic equipment
Feedback
Field effect transistors
Experiments
Resistors
Modulation
Fluxes
Electric potential

Cite this

Seppä, Heikki ; Ahonen, Antti ; Knuuttila, Jukka ; Simola, Juha ; Vilkman, Visa. / DC-squid electronics based on adaptive positive feedback : Experiments. In: IEEE Transactions on Magnetics. 1991 ; Vol. 27, No. 2. pp. 2488 - 2490.
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Seppä, H, Ahonen, A, Knuuttila, J, Simola, J & Vilkman, V 1991, 'DC-squid electronics based on adaptive positive feedback: Experiments', IEEE Transactions on Magnetics, vol. 27, no. 2, pp. 2488 - 2490. https://doi.org/10.1109/20.133723

DC-squid electronics based on adaptive positive feedback : Experiments. / Seppä, Heikki; Ahonen, Antti; Knuuttila, Jukka; Simola, Juha; Vilkman, Visa.

In: IEEE Transactions on Magnetics, Vol. 27, No. 2, 1991, p. 2488 - 2490.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - DC-squid electronics based on adaptive positive feedback

T2 - Experiments

AU - Seppä, Heikki

AU - Ahonen, Antti

AU - Knuuttila, Jukka

AU - Simola, Juha

AU - Vilkman, Visa

PY - 1991

Y1 - 1991

N2 - It is shown that DC-SQUID read-out electronics can be realized utilizing positive feedback without deteriorating the SQUID noise performance. The required gain rise is achieved by interconnecting the SQUID output and a flux modulation coil via a cooled FET acting as a voltage-controlled resistor; different SQUIDs with different types of FETs have been studied experimentally. Possible ways of adaptively controlling the feedback gain produced by the positive feedback are briefly discussed.

AB - It is shown that DC-SQUID read-out electronics can be realized utilizing positive feedback without deteriorating the SQUID noise performance. The required gain rise is achieved by interconnecting the SQUID output and a flux modulation coil via a cooled FET acting as a voltage-controlled resistor; different SQUIDs with different types of FETs have been studied experimentally. Possible ways of adaptively controlling the feedback gain produced by the positive feedback are briefly discussed.

U2 - 10.1109/20.133723

DO - 10.1109/20.133723

M3 - Article

VL - 27

SP - 2488

EP - 2490

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 2

ER -