Towards an Improved Programmable Quantum Current Generator

Azib, J.; Brun-Picard, J.; Schopfer, F.; Poirier, W.; Djordjevic, S.

doi:10.1109/cpem.2018.8501115

Cited by 3 publications

(4 citation statements)

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“…Here we have used a simplified model of two magnetically coupled series-RLC circuits as a generic model to account for the main features of the spectra (see appendix A.2) in different situations. Because it includes the magnetic coupling between the windings, this model goes beyond our previous simulations [20]. Figure 2(a) compares the noise spectra of the CCC not connected (bare CCC) and connected to the QHRS, without the damping circuit.…”

Section: Noise and Stability Issuesmentioning

confidence: 99%

“…Experimentally, we observed that high values of N D enhanced the effect of the damping. The results of a simulation shown in figure 3 Since the first implementation of the damping circuit in the PQCG with N D = 1600 [1], the winding of 2065 turns has then been favoured [20] not only to achieve a better efficiency but also to allow the use of the 1600-turns winding for N JK . At intermediate frequency (100 Hz < f < 10 kHz), the damping circuit is responsible for a damped resonance much broader than the self-resonance of the bare CCC [1,19,23].…”

Section: Dampingmentioning

confidence: 99%

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Improvements of the programmable quantum current generator for better traceability of electrical current measurements

et al. 2021

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A programmable quantum current generator based on the application of Ohm’s law to quantum voltage and resistance standards has demonstrated a realization of the ampere from the elementary charge with a 10−8 relative uncertainty (Brun-Picard et al 2016 Phys. Rev. X 6 041051). Here, we report on improvements of the device leading to a noise reduction of the generated quantized current. The improved quantum current generator is used to calibrate different ammeters with lower measurement uncertainties. Besides, measurements of its quantized current using a calibrated ultrastable low-noise current amplifier have shown that the realizations of the ampere at PTB (Physikalisch-Technische Bundesanstalt) and LNE (Laboratoire national de Métrologie et d’essais) in the range ±50 μA agreed to −3.7 parts in 107 with a combined standard uncertainty of 3.1 parts in 107 (coverage factor k c = 1).

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Section: Noise and Stability Issuesmentioning

confidence: 99%

Section: Dampingmentioning

confidence: 99%

Improvements of the programmable quantum current generator for better traceability of electrical current measurements

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Here we have used a simplified model of two magnetically coupled series-RLC circuits as a generic model to account for the main features of the spectra (see section 8.2) in different situations. Because it includes the magnetic coupling between the windings, this model goes beyond our previous simulations [20].…”

Section: Noise and Stability Issuesmentioning

confidence: 99%

“…Experimentally, we observed that high values of N D enhanced the effect of the damping. The results of a simulation shown in figure 3 Since the first implementation of the damping circuit in the PQCG with N D = 1600 [1], the winding of 2065 turns has then been favored [20] not only to achieve a better efficiency but also to allow the use of the 1600-turns winding for N JK . At intermediate frequency (100 Hz < f < 10 kHz), the damping circuit is responsible for a damped resonance much broader than the self-resonance of the bare CCC [19,1,23].…”

Section: Dampingmentioning

confidence: 99%

Improvements of the programmable quantum current generator for better traceability of electrical current measurements

Djordjevic,

Behr,

Drung

et al. 2021

Preprint

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A programmable quantum current generator based on the application of Ohm's law to quantum voltage and resistance standards has demonstrated a realization of the ampere from the elementary charge with a 10 −8 relative uncertainty [1]. Here, we report on improvements of the device leading to a noise reduction of the generated quantized current. The improved quantum current generator is used to calibrate different ammeters with lower measurement uncertainties. Besides, measurements of its quantized current using a calibrated Ultrastable Low-Noise Current Amplifier (ULCA) have shown that the realizations of the ampere at PTB (Physikalisch-Technische Bundesanstalt) and LNE (Laboratoire national de métrologie et d'essais) in the range ±50 µA agreed to -3.7 parts in 10 7 with a combined standard uncertainty of 3.1 parts in 10 7 (coverage factor k c = 1).

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Comparison of the Programmable Quantum Current Generator and an Ultrastable Low-Noise Current Amplifier

Djordjevic

Poirier

Drung

et al. 2020

2020 Conference on Precision Electromagnetic Measurements (CPEM)

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Towards an Improved Programmable Quantum Current Generator

Cited by 3 publications

References 1 publication

Improvements of the programmable quantum current generator for better traceability of electrical current measurements

Improvements of the programmable quantum current generator for better traceability of electrical current measurements

Improvements of the programmable quantum current generator for better traceability of electrical current measurements

Comparison of the Programmable Quantum Current Generator and an Ultrastable Low-Noise Current Amplifier

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