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

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pMOSFET Small SIgnal Model

In the derivation of the pMOS small signal model, the direction of current change as the voltage applied is reversed in polarity.

In other words, the small signal model of pMOS is the same as the small signal model of nMOS.

Figure 25 shows the small signal model of a pMOS transistor.

Figure 25: pMOS Small Signal Model

How do nMOSFET and pMOSFET differ

The mobility of electrons in nMOS is higher than the mobility of holes in pMOSFET.
pMOSFET has low current driving capability than nMOSFET
pMOSFET has lower transconductance than that of the nMOSFET
nMOSFET has comparatively higher output resistance than that of pMOSFET
nMOSFET provide more ideal current sources than that of the pMOSFET
nMOSFET have higher gain when used as amplifiers compared to pMOSFET
pMOSFET devices are less susceptible to interference than nMOSFET devices

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