Use of a Multiplier for Precise Measurements by Correlation of Low Noise Resistances.

被引：0
|
作者：
Le Pichon, J.P.
Grosvald, G.
Riaux, E.
机构：
来源：
Onde Electrique | 1977年 / 57卷 / 6-7期
关键词：
COMPUTERS - Multiplying Circuits;
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学科分类号：
摘要：
Usual difficulties which appear on measuring accurately the noise of low resistors are overcome here by realizing an apparatus using an analog multiplier acting as a cross-correlator, a low noise preamplifier and a set of dual active filters allowing to work over the frequency range of 200 Hz-500 kHz. The experiments performed on 5 and 20 OMEGA resistors show a resolution that may be still of 0,05 OMEGA for a frequency of 1 kHz.
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页码：431 / 434
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