Explain the Differentiate Between FET and BJT? PSBTE Paper

Explain the Differentiate Between FET and BJT ?

S.No	Parameter	FET	BJT
1.	Full Form	FET Stands for Field Effect Transistor.	BJT Stands for Bipolar Junction Transistor
2.	Input Impedance	Its input impedance is very high.	Its input impedance is high.
3.	Controlled Device	It is a Current controlled device.	It is a Voltage controlled device.
4.	Types of Device	It is a Uni-polar device. Because Conduction of current in FET is due to only one type of charge carriers i.e. majority carriers	It is a Bi-polar device Because Conduction of current in BJT involves both charge carriers i.e. majority carriers as well as minority carriers.
5.	Transconductance.	Low Transconductance.	High Transconductance.
6.	Voltage Gain	Low voltage gain.	High voltage gain.
7.	Noise	Noise is Lower as compared to BJT.	Noise is higher as compared to FET. Because charge carriers have to cross two PN junctions.
8.	Thermal Stability	Higher thermal stability.	Low thermal stability.
9.	Transfer characteristics.	Non Linear transfer characteristics.	Linear transfer characteristics.
10.	Size	Smaller size as compared to BJT.	Larger size as compared to FET.
11.	Gain-Bandwidth product.	Small gain-bandwidth product.	Large gain-bandwidth product.