Low-noise voltage amplifier using RF-superconducting quantum interference device

被引：3
|
作者：
Nakanishi, M [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Metrol Inst Japan, Tsukuba, Ibaraki 3058563, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2004年 / 43卷 / 10期
关键词：
low-noise voltage amplifier; superconducting quantum interference device; cryogenic current comparator; CCC-bridge;
D O I：
10.1143/JJAP.43.7307
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We developed a low-noise voltage amplifier using a commercially available rf-superconclucting quantum interference device (rf-SQUID) operated with a feedback circuit, which increased the input impedance to approximately 200MOmega. Its voltage resolution in the frequency range less than 1 Hz was measured to be approximately 0.4 nV. It was designed for a voltage detector of a resistance ratio bridge using a cryogenic current comparator (CCC-bridge).
引用
收藏
页码：7307 / 7310
页数：4
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