Self-Balancing Resistance Ratio Bridge Using a Cryogenic Current Comparator

Kinoshita,; Inagaki,; Yamanouchi,; Yoshihiro,; Kawaji,; Nagashima,; Kikuchi,; Wakabayashi,

doi:10.1109/cpem.1988.671233

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…A cryogenic current comparator (CCC) bridge, similar to the system described in reference [9], was used for these measurements. For the comparison of these devices with a 100 Ω standard resistor, a winding ratio of 2065:16 was used.…”

Section: Measurement System and Initial Graphene Measurementmentioning

confidence: 99%

Comparison Between NIST Graphene and AIST GaAs Quantized Hall Devices

Rigosi

Kruskopf

et al. 2020

IEEE Trans. Instrum. Meas.

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Several graphene quantized Hall resistance (QHR) devices manufactured at the National Institute of Standards and Technology (NIST) were compared to GaAs QHR devices and a 100 Ω standard resistor at the National Institute for Advanced Industrial Science and Technology (AIST). Measurements of the 100 Ω resistor with the graphene QHR devices agreed within 5 nΩ/Ω of the values for the 100 Ω resistor obtained through GaAs measurements. The electron density of the graphene devices was adjusted at AIST to restore device properties such that operation was possible at low magnetic flux densities of 4 T to 6 T. This adjustment was accomplished with a functionalization method utilized at NIST, allowing for consistent tunability of the graphene QHR devices with simple annealing. Such a method replaces older and less predictable methods for adjusting graphene for metrological suitability. The milestone results demonstrate the ease with

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Section: Measurement System and Initial Graphene Measurementmentioning

confidence: 99%

Comparison Between NIST Graphene and AIST GaAs Quantized Hall Devices

Rigosi

Kruskopf

et al. 2020

IEEE Trans. Instrum. Meas.

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“…The bridge circuit for measuring the ratio of two resistors in terms of the current ratio determined by a CCC is of the now standard form [8][9][10][11] and is shown schematically in figure 1.…”

Section: Bridge Outlinementioning

confidence: 99%

An automated cryogenic current comparator resistance ratio bridge for routine resistance measurements

et al. 2010

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A design of an automated cryogenic current comparator (CCC) resistance ratio bridge for routine measurements in a national metrology institute or standards laboratory is described. It employs a type II CCC for use in a low loss liquid helium storage vessel and can be continuously operated from the mains power via specialized isolated supplies. All parameters including the servo control loops are digitally controlled. Noise sources in the system are analysed using the Allan deviation and it is demonstrated that non-white noise sources can be eliminated by choosing an appropriate current reversal rate.

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Self-Balancing Resistance Ratio Bridge Using a Cryogenic Current Comparator

Cited by 2 publications

References 2 publications

Comparison Between NIST Graphene and AIST GaAs Quantized Hall Devices

Comparison Between NIST Graphene and AIST GaAs Quantized Hall Devices

An automated cryogenic current comparator resistance ratio bridge for routine resistance measurements

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