A current comparator for the precision measurement of D-C ratios

Kusters, N. L.; Moore, William J.; Miljanić, P.N.

doi:10.1109/tcome.1964.6539564

Cited by 31 publications

(7 citation statements)

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“…The setup of the current comparator bridge is schematically shown in figure 3. The ratio of the two currents is controlled by a dc comparator first realized by Kusters [26,27]. The two windings N p and N s are wound on a high permeability toroidal core.…”

Section: Zero-flux Detectormentioning

confidence: 99%

The quantum Hall effect as an electrical resistance standard

2001

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The quantum Hall effect (QHE) provides an invariant reference for resistance linked to natural constants. It is used worldwide to maintain and compare the unit of resistance. The reproducibility reached today is almost two orders of magnitude better than the uncertainty of the determination of the ohm in the International System of Units SI. This article is a summary of a recently published review article which focuses mainly on the aspects of the QHE relevant for its metrological application.

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Section: Zero-flux Detectormentioning

confidence: 99%

The quantum Hall effect as an electrical resistance standard

2001

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“…If the objective is to obtain a measurement uncertainty lower than 0.01%, even the best single-stage current transformers yield unacceptably large errors. The theory of current comparators [1], which appeared in 1962, was successfully applied to the design of instruments for high precision ac measurements, and later for dc measurements [2].…”

Section: Two-stage Current Transformermentioning

confidence: 99%

High precision calibration of ac current-to-voltage converters

Miljanić¹

2004

Metrologia

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A two-stage transformer, built as a current comparator with a shielded magnetic core, is used to make a novel ac bridge for calibration of ac shunts for large currents and other ac current-to-voltage converters. A fine adjustable reference transresistance is made by current transformation and a non-reactive precision resistor connected to the secondary. By using an auxiliary transformer and resistor, all four two-stage transformer secondary terminals are brought to ground potential and consequently both magnetizing and capacitive errors are kept below one part per million.

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“…The set-up of the current comparator bridge is schematically shown in figure 3. The ratio of the two currents is controlled by a dc comparator first realized by Kusters [26,27]. The two windings N p and N s are wound on a high permeability toroidal core.…”

Section: Measurement Techniquesmentioning

confidence: 99%

The quantum Hall effect as an electrical resistance standard

Jeckelmann

Jeanneret

2003

Meas. Sci. Technol.

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The quantum Hall effect (QHE) provides an invariant reference for resistance linked to natural constants. It is used worldwide to maintain and compare the unit of resistance. The reproducibility reached today is almost two orders of magnitude better than the uncertainty of the determination of the ohm in the International System of Units. This article is a summary of a recently published review article which focuses mainly on the aspects of the QHE relevant for its metrological application.

show abstract

A current comparator for the precision measurement of D-C ratios

Cited by 31 publications

References 0 publications

The quantum Hall effect as an electrical resistance standard

The quantum Hall effect as an electrical resistance standard

High precision calibration of ac current-to-voltage converters

The quantum Hall effect as an electrical resistance standard

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