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!

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