Difference between BJT and FET transistors

By | March 8, 2022

Difference between BJT and FET transistors

BJT

It stands for Bipolar Junction Transistors. BJT type of transistor uses both majority and minority charge carriers . The main function of Bipolar junction transistor is to amplify current. Bipolar transistors can be used as switches and amplifiers .A bipolar junction transistor consists of two p-n junctions. Classified into two types PNP and NPN. It has three terminals like emitter, base, and collector.

FET

FET stands for Field-effect transistor. It is also known as Unipolar transistor: Its operation depends on majority charge carriers which may be holes or electrons. charge carriers of this transistor flow from the source terminal to the drain terminal via an active channel. Field-effect transistors are classified into two types such as JFET and MOSFET.

Difference between BJT and FET transistors

Difference between BJT and FET transistors

Bipolar Junction Transistors (BJT) Field-effect transistor (FET)
It stands for Bipolar Junction Transistors. FET stands for Field-effect transistor.
It has three terminals like base, emitter, and collector. It has three terminals like Drain, Source, and Gate.
Frequency variations affect their performance. It has a high-frequency response.
Larger in size as compared to FET. Smaller in size than BJT.
BJT gain is more. FET gain is less.
Very low input impedance . Large Input impedance .
preferred for low current applications. preferred for low voltage applications.
Medium Switching time. Switching time is fast.
Power consumption is high as compared to FETs. Power consumption is low as compared to Bipolar Junction Transistors.

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