DC-SQUID ELECTRONICS BASED ON ADAPTIVE POSITIVE FEEDBACK - EXPERIMENTS

被引：34

作者：

SEPPA, H ^{[1
]}

AHONEN, A ^{[1
]}

KNUUTILA, J ^{[1
]}

SIMOLA, J ^{[1
]}

VILKMAN, V ^{[1
]}

机构：

[1] HELSINKI UNIV TECHNOL,LOW TEMP LAB,SF-02150 ESPOO,FINLAND

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1991年 / 27卷 / 02期

关键词：

D O I：

10.1109/20.133723

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper demonstrates that the 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. Possibilities to build an adaptive control of the feedback gain produced by the positive feedback are briefly discussed.

引用

页码：2488 / 2490

页数：3

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