Low temperature direct current comparators
作者:
D. B. Sullivan,
R. F. Dziuba,
期刊:
Review of Scientific Instruments
(AIP Available online 1974)
卷期:
Volume 45,
issue 4
页码: 517-519
ISSN:0034-6748
年代: 1974
DOI:10.1063/1.1686674
出版商: AIP
数据来源: AIP
摘要:
This paper presents an improved version of the low temperature direct current comparator described originally by Harvey. The comparator described herein exhibits a resolution of 1.5 nA ·turn and provides ratios which have uncertainties of less than 4 parts in 1010. An alternate approach to the shielding of the windings is discussed and a preliminary comparator based on this concept is shown to have equally good performance. The latter comparator is probably better suited to the attainment of large current ratios.
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