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Related Concept Videos

Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

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In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
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Equivalent Capacitance01:19

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Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
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From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
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In electrical circuits, resistors can be connected in series, sequentially linked one after the other. In a series configuration, the same current flows through each resistor. Ohm's law is a fundamental principle to understand the behavior of resistors in series. It expresses the voltage across these resistors in terms of the current and resistance.
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Parallel Resonance

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The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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A capacitor divider with bandwidth over 10 GHz.

Fan Guo1, Bing Wei1, Le Xu1

  • 1Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China.

The Review of Scientific Instruments
|October 10, 2025
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This study investigates capacitor dividers for high-voltage pulse measurement. Decreasing sensor size improves frequency response, and a novel method accurately measures fast pulses up to 12 GHz.

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Area of Science:

  • Electrical Engineering
  • High-Voltage Engineering
  • Pulse Measurement Technology

Background:

  • Capacitor dividers are crucial for high-voltage pulse diagnostics.
  • Optimizing their amplitude-frequency response is essential for accurate measurements.

Purpose of the Study:

  • To investigate the characteristics of disk and coaxial capacitor dividers.
  • To enhance the upper-limited response frequency of these sensors.
  • To develop methods for accurate high-voltage pulse measurement.

Main Methods:

  • Experimental analysis of disk capacitor dividers with varying diameters.
  • Experimental and circuit simulation of coaxial capacitor dividers with varying lengths.
  • Development of a numerical post-processing method for low-frequency compensation.

Main Results:

  • Decreasing the diameter of disk capacitor dividers improves upper-limited response frequency.
  • Decreasing the length of coaxial capacitor dividers enhances upper-limited response frequency.
  • A coaxial sensor achieved an upper-limited response frequency of approximately 12 GHz for 100 ps rise-time pulses.

Conclusions:

  • Sensor geometry significantly impacts high-voltage pulse measurement bandwidth.
  • A numerical post-processing technique enables accurate measurement of fast high-voltage pulses with capacitor dividers.