A digital compensation bridge forR–Ccomparisons

Lan, Jingchao; Zhang, Z; Li, Z; He, Qing; Zhao, Jianguo; Lu, Zhewen

doi:10.1088/0026-1394/49/3/266

Cited by 22 publications

(10 citation statements)

References 23 publications

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“…Initially, based on the model (12), observations were made of dynamic errors of the auto-balancing bridge occurring on the phase plane G = G X •R O = 0÷1.0 and B = B X •R O = 0 ÷ 1.0. The two quantities D and C, according to (16) and (17) negatively affecting the measurement accuracy, maintain a controversial relationship with the reference resistance R O , the proportional C, and the inverse D. In: [18] criteria were introduced to roughly discriminate between low, middle, and high impedance. The reference resistance R O = 10kΩ corresponds to the middle sub-range of the measurement [18], therefore the research concerned conductance and susceptance measurements from 0 to 10 −4 S.…”

Section: Numerical Simulation's Methodologymentioning

confidence: 99%

“…They are very popular in numerous lab environments. The basic functionality and Schematic of such bridges was presented in detail in the following literature: [14]- [17]. There are several methods of measuring impedance, each of which has its advantages and disadvantages, and the choice of the appropriate one depends primarily on the ranges of measured impedance parameters, the required accuracy and speed of measurement, the range of the test signal frequency and simplicity of operation.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Dynamic Errors Correcting Algorithm for Auto–Balancing Bridge Methods

Khoma

Podpora

et al. 2020

IEEE Access

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Autobalancing bridge method is widely used to measure the impedance of various objects in many fields of science and technology. The article presents an innovative approach to address autobalancing bridge dynamic errors to extend the range of operating frequencies. The mathematical model of auto-balancing bridge, implemented using operational amplifier, was analysed, obtaining its simplified version taking into account the most important sources of errors. The concept was developed and the algorithms for compensation of the impact of dynamic errors on the measurement of admittance components were synthesized. The presented algorithms allow the correction of admittance measurements only based on "raw" results obtained with the use of an auto-balancing bridge. Methodology was described and numerical simulation was carried out on a selected example. As shown in the paper, the developed correction algorithms allow extending significantly (400 times) the range of admittance measurement frequencies. These algorithms do not require interfering the auto-balancing bridge structure, but only engage the computing power of modern measurement channels. INDEX TERMS auto-balancing bridge method, conductance and susceptance measurement, correction algorithms, dynamic errors in frequency domain, mathematical model of operational circuit, multifrequency impedance meter.

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Section: Numerical Simulation's Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Dynamic Errors Correcting Algorithm for Auto–Balancing Bridge Methods

Khoma

Podpora

et al. 2020

IEEE Access

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“…The schematic diagram of the bridge, well known in the literature (see [2,Ch. 5] and references therein; [3,4]), is given in Fig. 1.…”

Section: Bridge Principlementioning

confidence: 99%

Experiences With a Two-Terminal-Pair Digital Impedance Bridge

Callegaro

D'Elia

Kampik

et al. 2015

IEEE Trans. Instrum. Meas.

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This paper describes the realization of a two-terminal-pair digital impedance bridge and the test measurements performed with it. The bridge, with a very simple architecture, is based on a commercial two-channel digital signal synthesizer and a synchronous detector. The bridge can perform comparisons between the impedances having arbitrary phase and magnitude ratio. The bridge balance is achieved automatically in less than 1 min. R – C comparisons with calibrated standards, at kilohertz frequencies and 100- text{k}\Omega magnitude level, give ratio errors of the order of 10^{-6} , with potential for further improvements

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“…These perspective works are provided today as well [21,22,23]. Last years a lot of works are devoted to use the synthesizers based on the Josephson array, but this very arrurate solution is too expensive for comercial devises.…”

Section: Principle Of the Bridge Operationmentioning

confidence: 99%

Wide frequency range quadrature bridge comparator Pont

Surdu¹,

Lameko²,

Surdu³

et al. 2013

16th International Congress of Metrology

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Abstract. The quadrature bridge for comparison of the impedance standards in wide frequency and dynamic range was developed. The digital phase inversion of the operating signal is the single internal standard of this bridge. Technically bridge is based on the digital synthesizers of the sinusoidal signals, which are used as sources of quadrature voltages, supplying the standards to be compared. The appropriate algorithm of measurement eliminates the influence of the synthesizer's uncertainty on the results of measurement. The bridge can compare the impedance of the standards on frequency range from units of Hz to units of kHz with uncertainty better than 1 ppm and resolution better than 0.03 ppm.Le pont en quadrature a été élaboré pour comparer les impédances sur une large bande de fréquences et valeurs de l'impédance. Le seul étalon interne du pont est l'inversion numérique de phase du signal. Dans l'aspect technique, l'étalon est se base sur les synthétiseurs numériques des signaux sinusoïdaux, utilisés comme les alimentateurs des branches du pont. L'algorithme élaboré exclut complètement l'erreur des synthétiseurs sur le résultat de la comparaison des impédances des étalons comparés. Le pont peut comparer les étalons variant entre les unités Hz et les unités kilohertz avec l'erreur de moins de 1 ppm et sensibilité de plus de 0.03 ppm.

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A digital compensation bridge forR–Ccomparisons

Cited by 22 publications

References 23 publications

Synthesis of Dynamic Errors Correcting Algorithm for Auto–Balancing Bridge Methods

Synthesis of Dynamic Errors Correcting Algorithm for Auto–Balancing Bridge Methods

Experiences With a Two-Terminal-Pair Digital Impedance Bridge

Wide frequency range quadrature bridge comparator Pont

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