Mask-group

To use MOSFET device as a Capacitor

Introduction of Field Effect Transistors Distinction between a BJT and FET Junction Field Effect Transistor (JFET) N Channel JFET Summary of JFET Operation Mutual or Transfer Characteristic of n-channel JFET Amplification Factor 𝝁 Definition of Parameters p-Channel JFET

Introduction of Metal Oxide Semiconductor Field Effect Transistor - Mosfet Terminals in MOSFET Physical structure of MOSFET MOSFET Working Operation Summary of Operation MOSFET - N Type MOSFET Operation How does Drain current flow MOSFET operation More about Threshold Voltage Current vs Voltage Characteristics - Derivation Non Ideal Current -Voltage Effects or Second Order Effects Short Channel Effects MOSFET Device Capacitances MOSFET Large and Small signal Model pMOSFET Small SIgnal Model To use MOSFET device as a Capacitor nMOSFET as Capacitor- Working

Single Stage Amplifiers Common Source CS Stage with Diode-Connected Load Circuit to measure the Equivalent Resistance Common Drain Stage or Source Follower Common Gate Amplifier Large Signal Behavior Calculation of Input Resistance of a Common Gate Stage

Inverter with Enhancement n- Type MOS as Load Inverter with Linear Enhancement Type Load

To use MOSFET device as a Capacitor

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To use MOSFET device as a Capacitor:

Let us use nMOSFET device here for discussion.

Use the Figure 26 for the working of nMOSFET as a Capacitor.

Figure 26: MOSFET(n) as Capacitor - Accumulation region

The following points to be noted:

The Source, Drain and the Bulk/Body terminals are grounded
The Gate voltage applied is variable
For Gate Voltage less than the Threshold Voltage, the transistor operates in the sub-threshold region
For Gate Voltage equal to or greater than the Threshold Voltage, the inversion layer starts developing in the transistor.

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