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Equivalent Capacitance01:19

Equivalent Capacitance

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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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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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A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
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The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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In electrical power systems, understanding the capacitance of transmission lines is fundamental for efficient operation.
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Voltammetry: Factors Affecting Measurements01:21

Voltammetry: Factors Affecting Measurements

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A current produced due to the redox reactions of the analyte at the working and auxiliary electrodes is called a faradaic current. The reaction can be divided into two types. The current generated due to the reduction of the analyte is called cathodic current, and it carries a positive charge. In contrast, the current produced by analyte oxidation is known as an anodic current, and it has a negative charge. The applied potential at the working electrode determines the faradaic current flow, and...
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Scanning-probe Single-electron Capacitance Spectroscopy
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Rapid and Accurate C-V Measurements.

Ji-Hong Kim1, Pragya R Shrestha2, Jason P Campbell1

  • 1Engineering Physics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.

IEEE Transactions on Electron Devices
|June 6, 2017
PubMed
Summary

This study introduces a rapid method for measuring metal-oxide-semiconductor (MOS) capacitor capacitance-voltage (C-V) curves. By correcting for system distortions, this technique provides accurate C-V data in just two seconds.

Keywords:
C-V measurementCapacitance measurementFast C-V measurementMOS devicesSemiconductor device measurementsTransient measurement

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Semiconductor Physics

Background:

  • Capacitance-voltage (C-V) characterization is crucial for analyzing semiconductor devices.
  • Traditional C-V measurements can be time-consuming and susceptible to system non-idealities.
  • Accurate C-V data is essential for understanding material properties and device performance.

Purpose of the Study:

  • To develop a fast and accurate method for measuring full C-V characteristic curves of MOS capacitors.
  • To overcome limitations of conventional C-V measurement techniques.
  • To enable rapid characterization of semiconductor materials and devices.

Main Methods:

  • Direct digitization of displacement current from a MOS capacitor using an oscilloscope with a 100 MHz sine-wave.
  • Extraction of the system response function using a known MOS capacitor.
  • Deconvolution to correct the measured C-V curve of the unknown MOS capacitor.

Main Results:

  • A novel technique for rapid C-V measurement was successfully demonstrated.
  • The method corrects for system distortions without needing de-skewing or leakage current correction.
  • Excellent agreement was achieved between the new fast C-V method and conventional LCR meter measurements.

Conclusions:

  • The developed technique offers a significantly faster approach to C-V characterization.
  • This method simplifies the measurement and analysis process for MOS capacitors.
  • The rapid C-V measurement technique holds promise for efficient semiconductor device analysis.