Settling Behavior of the Bridge Voltage in Resistance Ratio Measurements With Cryogenic Current Comparators

被引：6
|
作者：
Goetz, Martin [1 ]
Drung, Dietmar [2 ]
Pesel, Eckart [1 ]
Ahlers, Franz-Josef [1 ]
机构：
[1] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany
[2] Phys Tech Bundesanstalt, D-10587 Berlin, Germany
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2011年 / 60卷 / 07期
关键词：
Current comparators; noise; resistance measurements; transient analysis;
D O I：
10.1109/TIM.2010.2100690
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：
Along settling time of the bridge voltage in resistance comparison setups with cryogenic current comparators might become crucial with respect to the type-A uncertainty, because it effectively limits the frequency of current reversals. Using a new bridge voltage detector with considerably increased bandwidth, we were able to trace the transient distortions caused by current reversal. Significant influence of the cabling is observed. Comparing a 12.9-k Omega quantum Hall resistor and a 100-Omega standard resistor, we achieved an expanded type-A uncertainty of about three parts in 10(10) after 24 min of measurement for current reversal frequencies down to 100 mHz.
引用
收藏
页码：2660 / 2666
页数：7
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