A direct readout high-Tc dc SQUID electronics with ac bias and a liquid-nitrogen-cooled preamplifier

被引：1
|
作者：
Gudoshnikov, SA [1 ]
Matveets, LV
Weidl, R
Dörrer, L
Seidel, P
Krasnosvobodtsev, SI
Kalabukhov, AS
Snigirev, OV
机构：
[1] Russian Acad Sci, Inst Terr Magnetism Ionosphere & Radio Wave Propa, Troitsk 142092, Moscow Region, Russia
[2] Univ Jena, Inst Festkorperphys, D-6900 Jena, Germany
[3] PN Lebedev Phys Inst, Moscow 117924, Russia
[4] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1999年 / 9卷 / 02期
关键词：
D O I：
10.1109/77.783999
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：
Direct readout de SQUID electronics based on a liquid-nitrogen-cooled preamplifier and alternating current bias was developed. The preamplifier with an intrinsic voltage noise of 0.18 nV/Hz(1/2) was used as the first stage of this electronics. A mathematical description of the noise suppression by this electronics was done. Low-frequency noise was reduced by a factor of 6 at 1 Hz by this technique.
引用
收藏
页码：4397 / 4399
页数：3
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