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Contents

Electronic Devices

PN Junction

PN Junction Basics Forward and Reverse Bias Diode Equation Junction Capacitance Breakdown Mechanisms Small Signal Model

BJT Fundamentals

BJT Operation BJT Configurations Current Components Ebers-Moll Model Transistor Switching

FET Fundamentals

JFET Basics MOS Capacitor MOSFET Structure MOSFET Operation MOSFET I-V CMOS Basic

Special Devices

Zener Diode Tunnel Diode Varactor Diode Schottky Diode UJT

Optoelectronics

Light Emitting Diodes Photodiodes Solar Cells Laser Diodes Fiber Optic Sources Phototransistors Optocouplers

Power Devices

Power Diodes Power MOSFETs IGBTs Thyristors GTO and TRIAC

Other Topics

IC Fabrication Basics Nanoelectronics Intro MEMS Single Electron Transistor

Other Subjects

Analog Electronics Digital Electronics Signals & Systems Control Systems Electromagnetic Theory Digital Communication Analog Communication Network Analysis Microprocessors VLSI Design Verilog HDL Power Electronics Embedded Systems DSP

Section Progress33%

2 of 6 articles

MOS Capacitor

Accumulation, Depletion, Inversion.

Updated: 19 March 2026

9 min read

MOS Capacitor Quiz

Test your understanding of accumulation, depletion, and inversion in MOS capacitor structures.

Question 1 of 3

Q1.In a p-type MOS capacitor (metal-oxide-p-silicon), inversion occurs when the surface potential phi_s equals:

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