Difference between JFET and MOSFET (original) (raw)
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:
| 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. |