期刊
ELECTRONICS
卷 11, 期 21, 页码 -出版社
MDPI
DOI: 10.3390/electronics11213446
关键词
high voltage; high-voltage probe; resistive voltage divider; frequency compensation; capacitive coupling
资金
- European Union [899261]
Resistive voltage dividers tend to have a highly non-linear transfer function due to the influence of parasitic and stray capacitances. This article presents an improved resistive voltage divider with additional compensation capacities to extend the linear bandwidth. The performance of this new voltage divider is demonstrated by measuring high-voltage pulses.
Resistive voltage dividers tend to have a highly non-linear transfer function as parasitic and stray capacitances exert an increasing influence with increasing frequency. The non-linear transfer function depends on the topology and resistors used and consists of a low-pass filter with an additional high-pass component in the GHz range. Due to the non-linear transfer function the measured signal differs from the original input signal. Here, we present an improved resistive voltage divider with additional compensation capacities to extend the linear bandwidth. With this new concept, the linear bandwidth is improved from 115 kHz to 88 MHz, while maintaining a DC input impedance of 10 M Omega. For high-voltage insulation and easy manufacturing, surface mounted resistors on a printed circuit board with a compensation electrode on the adjacent side are used. The performance of this resistive voltage divider is demonstrated by measuring a series of high-voltage pulses with an amplitude of 2.5 kV(peak-peak). The measured pulse rise time is about 16 ns, corresponding to an average slew-rate of 150 V/ns. Finally, the developed resistive voltage divider is successfully used to measure fast high-voltage transients required for advanced ion mobility spectrometers with integrated collision induced fragmentation.
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