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:
S.NO. |
PRIMARY KEY |
FOREIGN KEY |
1 |
JFET(Junction Gate Field-Effect Transistor) is a three-terminal semiconductor device. |
MOSFET(Metal–Oxide–Semiconductor Field-Effect Transistor) is a four-terminal semiconductor device. |
2 |
It can only operates in the depletion mode. |
It operates in both depletion mode and enhancement mode. |
3 |
It 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. |
4 |
It allows the gate leakage current on the order of 10^-9 A |
While the gate leakage current for MOSFETs will be of the order of 10^-12 A. |
5 |
It is relatively cheaper than MOSFETs |
It is expensive one. |
6 |
These are ideal for low noise applications. |
These are mainly used for high noise applications. |
7 |
These are less susceptible to damage because of the high input capacitance. |
These are more susceptible to damage because of the metal oxide insulator. |
8 |
Manufacturing process of JFETs is simple. |
Manufacturing process of MOSFETs is complex. |
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Last Updated :
28 Mar, 2020
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