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FET-Field-Effect-Transistors

By Ashik
FET vs. BJT
 
Advantages:
•FET has very high input impedance compared to BJT so that it can be used in amplifiers.
•FETs are more temperature stable.
•FETs are smaller in size.
Limitations:
•BJT has higher sensityvitty in change of signals than FETs. This property makes higher current gain in BJT’s output than FETs.




General Information




 
•BJT is a current controlled device.
•FET is a voltage controlled device
•FET is an unipolar device
•An electric field is established through which charges will be directed.


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