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A High-Precision Low-Noise High-Voltage Source

  • ELECTRONICS AND RADIO ENGINEERING
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Abstract—

A digitally controlled high-precision low-noise high-voltage source is described. A push–pull parallel resonant voltage converter with a constant switching frequency of 110 kHz is used in the source. The high-voltage source is adjusted by changing the output voltage of a linear voltage regulator that feeds the resonant converter. An algorithm for controlling the converter switches that makes it possible to implement a mode of supplying the parallel circuit of the converter from the voltage source is proposed. An automatic frequency control system ensures the temperature stability of the converter operating mode. An active ripple filter was designed. Its main feature is the application of a compensating voltage between the common bus of the source and the low-potential output of the voltage multiplier. This solution made it possible to construct the filter based on one low-voltage op-amp, which is simultaneously used as an error signal amplifier of the source control loop. As a result of applying the active filter, the output noise and ripple peak-to-peak amplitude at frequencies higher than 10 Hz does not exceed 3.3 mV. The peak-to-peak noise in the frequency range of 0.1–10 Hz is below 3.5 mV and is determined by the 1/f noise level of the used voltage reference. The developed high voltage source is used in the ion source power supply of the mass-spectrometry system for isotope analysis of noble gases and has the following specifications: the output-voltage control range is 0–5500 V with a step of 84 mV; the maximum load current is 1 mA; and the overall output voltage instability is no more than 50 ppm/h in the operating temperature range of 20–50°C.

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Funding

This study was performed within the State Job of the Northern Energetics Research Center, Kola Science Center, Russian Academy of Sciences (no. 0226-2019-0067 “Investigation of Scientific and Technical Problems of Providing Reliable and Efficient Energy Supply of Consumers in the Arctic Zone of the Russian Federation”).

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Authors and Affiliations

  1. Northern Energetics Research Center, Branch of the Federal Research Center, Kola Science Center, Russian Academy of Sciences (NERC KSC RAS), 184209, Apatity, Murmansk oblast, Russia

    V. V. Kolobov & M. B. Barannik

Authors
  1. V. V. Kolobov
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  2. M. B. Barannik
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Correspondence to V. V. Kolobov or M. B. Barannik.

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Translated by A. Seferov

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Kolobov, V.V., Barannik, M.B. A High-Precision Low-Noise High-Voltage Source. Instrum Exp Tech 64, 796–804 (2021). https://doi.org/10.1134/S0020441221050195

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