Precision Differential Sampling Measurements of Low-Frequency Synthesized Sine Waves With an AC Programmable Josephson Voltage Standard

Rüfenacht, Alain; Burroughs, Charles J.; Benz, Samuel P.; Dresselhaus, Paul D.; Waltrip, B.C.; Nelson, Thomas L.

doi:10.1109/tim.2008.2008087

Cited by 90 publications

(56 citation statements)

References 22 publications

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“…A precision relay switch Sw and high accuracy digital samplers DVM in the differential sampling mode [6] are used for comparisons between the PJVS output The performance of the current transformer CT1, 5 A (1 A)/10 mA, is critical for the I/V converter. At a burden R b as large as 120 , the CT1 two-stage design is ineffective.…”

Section: Design Detailsmentioning

confidence: 99%

“…Programmable Josephson Voltage Standards (PJVS) have been recently applied to development of low-frequency AC power standards with quantum accuracy [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

“…The PJVS is combined with differential digital sampling [6] for reducing the uncertainties created by the PJVS voltage step transitions. The system uses a multichannel DSPbased generator of spectrally pure waveforms, and a voltage amplifier with permuting-resistance dividers.…”

Section: Introductionmentioning

confidence: 99%

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Progress in the development of low-frequency quantum-based AC Power Standard at NRC Canada

Djokic

2010

Cpem 2010

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Section: Design Detailsmentioning

confidence: 99%

“…Programmable Josephson Voltage Standards (PJVS) have been recently applied to development of low-frequency AC power standards with quantum accuracy [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Progress in the development of low-frequency quantum-based AC Power Standard at NRC Canada

Djokic

2010

Cpem 2010

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“…Significant progress has been made for a number of ac metrology applications, most usefully with sampled comparisons [2]. Unfortunately, the inherent error in the output voltage caused by the transitions between the quantized voltages remains a fundamental and unsolved weakness after all these years.…”

Section: Introductionmentioning

confidence: 99%

Method for ensuring accurate AC waveforms with programmable Josephson voltage standards

Burroughs

Rüfenacht

Benz

et al. 2012

2012 Conference on Precision Electromagnetic Measurements

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The amplitudes of stepwise-approximated sine waves generated by programmable Josephson voltage standards (PJVS) are not intrinsically accurate because the transitions between the quantized voltages depend on numerous conditions. We have developed a method that ensures that the total rms output voltage of arbitrary ac waveforms synthesized by the PJVS are accurate and referenced to the quantized Josephson voltages. This is accomplished by digitizing the entire output waveform, utilizing the quantum voltages to correct digitizer gain, noise, and nonlinearity, and then applying our understanding of the interplay between measurement bandwidth, risetime, and harmonic content to precisely tune the bias parameters. Our goal is to develop an AC standard source for voltage metrology that can directly synthesize voltages with the accuracy expected of a quantum-based standard without the use of a thermal voltage converter. *

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“…An alternative approach is to take sampled measurements at times when the array output is quantised. This can be done by sampling either the total array voltage [7], or by sampling the difference voltage between the array output and a second voltage source [8].…”

Section: Introductionmentioning

confidence: 99%

Quantum waveform synthesizer using Nb/TiN/Nb binary-divided Josephson junction arrays

Williams

Henderson

Yamada

2012

2012 Conference on Precision Electromagnetic Measurements

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This paper describes the development of a quantum waveform synthesizer operating at a sampling frequency of 100 kHz with the aim of generating sine waves directly traceable to the Josesphson quantum voltage standard. The quantum reference is based on arrays of 65 536 Josephson junctions, fabricated using Nb/TiN/Nb technology and operating at a bias frequency of 16 GHz corresponding to an output voltage of approximately 2.2 V. The synthesizer contains a specially constructed difference amplifier, digital source and anti-imaging filter. The type A uncertainty is estimated to be 40 nV for a 1 s observation time.Index Terms-Josephson effect, measurement standards, measurement uncertainty, precision measurements, signal generators, voltage measurement.

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Precision Differential Sampling Measurements of Low-Frequency Synthesized Sine Waves With an AC Programmable Josephson Voltage Standard

Cited by 90 publications

References 22 publications

Progress in the development of low-frequency quantum-based AC Power Standard at NRC Canada

Progress in the development of low-frequency quantum-based AC Power Standard at NRC Canada

Method for ensuring accurate AC waveforms with programmable Josephson voltage standards

Quantum waveform synthesizer using Nb/TiN/Nb binary-divided Josephson junction arrays

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