EDC | FET | MOSFET | 2 Marks

Types of MOSFET

• Depletion MOSFET (n-type, p-type)
• Enhancement MOSFET (n-type, p-type)

Depletion MOSFET Vs Enhancement MOSFET

S. No.	D-MOSFET (n-channel)	E-MOSFET (n-channel)
1.	Negative voltage at gate	Positive voltage at gate
2.	Positive charges on the semiconductor site	Negative charges on the semiconductor site
3.	Depletion of majority carriers	Inversion layer is formed

 
JFET Vs MOSFET

S. No.	JFET (n-channel)	MOSFET (n-channel)
1.	Between Gate and channel is a PN junction forming a diode	Between gate and channel is an insulating SiO2 layer forming a small capacitor
2.	Gate is reverse biased (negative voltage for n-channel)	Gate can be given positive or negative voltage depending on mode of operation required
3.	High input impedance due to reverse biased gate	Very high impedance due to insulated gate and capacitance effect
4.	Operated only in depletion mode	Operated in depletion and enhancement mode

 Yet to be updated!