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Difference between JFET and MOSFET

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  • Difficulty Level : Medium
  • Last Updated : 28 Mar, 2020

JFET (Junction Gate Field-Effect Transistor):
JFET is a field-effect transistor and it is the three terminal devices. There are number of application of that, it can be used as switch, amplifier, etc. It is classified into two categories: N-Channel JFET and P-Channel JFET.

MOSFET (Metal–Oxide–Semiconductor Field-Effect Transistor):
The MOSFET is a field-effect transistor and it is a four terminal device with source(S), gate (G), drain (D) and body (B) terminals. It’s generally classified into two basic configurations: Depletion Mode MOSFET and Enhancement Mode MOSFET.

Let’s see the difference between Primary Key and Foreign Key:

1JFET(Junction Gate Field-Effect Transistor) is a three-terminal semiconductor device.MOSFET(Metal–Oxide–Semiconductor Field-Effect Transistor) is a four-terminal semiconductor device.
2It can only operates in the depletion mode.It operates in both depletion mode and enhancement mode.
3It has high input impedance on the order of 1010 ohms, therefore they are more sensitive towards input voltage signals.It offers even higher input impedance than the JFETs, theredore they are more resistive.
4It allows the gate leakage current on the order of 10^-9 AWhile the gate leakage current for MOSFETs will be of the order of 10^-12 A.
5It is relatively cheaper than MOSFETsIt is expensive one.
6These are ideal for low noise applications.These are mainly used for high noise applications.
7These are less susceptible to damage because of the high input capacitance.These are more susceptible to damage because of the metal oxide insulator.
8Manufacturing process of JFETs is simple.Manufacturing process of MOSFETs is complex.

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