Reducing Parasitic Oscillations of Capacitive Dividers Using Coaxial Symmetry in the Low-Voltage Arm

Wens, Thor; Fagnard, Jean-François; Laurent, Philippe; Greffe, Christophe; Vanderbemden, Philippe

doi:10.1109/tim.2025.3576013

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Reducing Parasitic Oscillations of Capacitive Dividers Using Coaxial Symmetry in the Low-Voltage Arm

Wens, Thor; Fagnard, Jean-François; Laurent, Philippe et al.

2025 • In IEEE Transactions on Instrumentation and Measurement

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/332735

DOI
10.1109/tim.2025.3576013

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Keywords :

Capacitive divider; Parasitic oscillations; Design rule; High-Voltage pulses; Pulsed power; Spiral generators

Abstract :

[en] In this paper, a new design rule to mitigate parasitic oscillations superimposing to the measurement of high-voltage pulses is proposed. We establish a transfer function of capacitive dividers that includes not only the self inductances of the high and low-voltage arms of the divider but also the mutual inductance that exists between both arms of the dividers. Mathematical analysis and experimental validation demonstrate that the parasitic oscillations can be significantly reduced by using a coaxial configuration of the low-voltage arm printed circuit board (PCB). The proposed design rule can be implemented on any capacitive divider, enabling a compact low-voltage side design, whose voltage division factor can be conveniently modified. In this work, the design rule is validated on a custom-built capacitive divider, designed to measure high-voltage pulses generated by spiral generators. The designed capacitive divider successfully measured pulses up to 289 kV with a voltage division factor exceeding 100,000 with minimal parasitic oscillations.

Disciplines :

Electrical & electronics engineering

Author, co-author :

Wens, Thor ; Université de Liège - ULiège > Montefiore Institute of Electrical Engineering and Computer Science ; Department of Electrical Engineering and Computer Science (Montefiore Research Unit), Université, de Liè,ge, Liè,ge, Belgium

Fagnard, Jean-François ; Université de Liège - ULiège > Montefiore Institute of Electrical Engineering and Computer Science ; Department of Electrical Engineering and Computer Science (Montefiore Research Unit), Université, de Liè,ge, Liè,ge, Belgium

Laurent, Philippe ; Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Systèmes microélectroniques intégrés ; Department of Electrical Engineering and Computer Science (Montefiore Research Unit), Université, de Liè,ge, Liè,ge, Belgium

Greffe, Christophe ; Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Capteurs et systèmes de mesures électriques ; GeneriX SRL, Angleur, Belgium

Vanderbemden, Philippe ; Université de Liège - ULiège > Département d'électricité, électronique et informatique (Institut Montefiore) > Capteurs et systèmes de mesures électriques ; Department of Electrical Engineering and Computer Science (Montefiore Research Unit), Université, de Liè,ge, Liè,ge, Belgium

Language :

English

Title :

Reducing Parasitic Oscillations of Capacitive Dividers Using Coaxial Symmetry in the Low-Voltage Arm

Publication date :

03 June 2025

Journal title :

IEEE Transactions on Instrumentation and Measurement

ISSN :

0018-9456

eISSN :

1557-9662

Publisher :

Institute of Electrical and Electronics Engineers (IEEE)

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://ieeexplore.ieee.org/document/11021614

Name of the research project :

COGEHTIC2

Funders :

Région wallonne

Funding number :

convention 2110062

Available on ORBi :

since 06 June 2025

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