Explain And Compare Jfet's And Mosfet's?

1.	Explain And Compare Jfet's And Mosfet's?
Answer» Comparison of JFET's and MOSFET's: JFET's can only be operated in the DEPLETION mode whereas MOSFET's can be operated in either depletion or in ENHANCEMENT mode. In a JFET, if the gate is forward-biased, excess-carrier injunction occurs and the gate-current is substantial. MOSFET's have input impedance much higher than that of JFET's. Thus is DUE to negligible SMALL leakage current. JFET's have characteristic curves more flat than that of MOSFET is indicating a higher drain resistance. When JFET is operated with a reverse-bias on the junction, the gate-current IG is larger than it WOULD be in a comparable MOSFET. Comparison of JFET's and MOSFET's:

Answer»

Comparison of JFET's and MOSFET's:

JFET's can only be operated in the DEPLETION mode whereas MOSFET's can be operated in either depletion or in ENHANCEMENT mode. In a JFET, if the gate is forward-biased, excess-carrier injunction occurs and the gate-current is substantial.
MOSFET's have input impedance much higher than that of JFET's. Thus is DUE to negligible SMALL leakage current.
JFET's have characteristic curves more flat than that of MOSFET is indicating a higher drain resistance.
When JFET is operated with a reverse-bias on the junction, the gate-current IG is larger than it WOULD be in a comparable MOSFET.

Comparison of JFET's and MOSFET's:

Discussion