MOSFET - N Type MOSFET Operation

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

MOSFET - N Type MOSFET Operation

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The N Type MOSFET consists of the MOS capacitor connected between the Source and Drain regions.

Such type of circuit is shown in Figure 13, the figure also shows the bias connections made.

Figure 13: MOSFET along with BIAS

Now let's apply V_GS which is greater than the Threshold voltage discussed earlier. When such a voltage is applied the inversion layer is formed between the Source and Drain, this is called an inverted channel.

This is shown in Figure 14.

Figure 14: Formation of Inversion Layer

The electrons can flow from the Source to the Drain using the inversion layer as channel.

It may be noted that the Source terminal and the Body terminal are connected together. Here it may be noted that both the terminals are connected to Ground. Similarly the Drain is also connected to the Ground at present.

Because of this it may be noted that the inversion layer (channel) is uniform between the Source and Drain.

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MOSFET - N Type MOSFET Operation

Field Effect Transistors

Field Effect Transistors

Metal Oxide Semiconductor Field Effect Transistor - Mosfet

Metal Oxide Semiconductor Field Effect Transistor - Mosfet

Amplifiers

Amplifiers

Inverters

Inverters

MOSFET - N Type MOSFET Operation