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Which of the following option is true for FET?

Which of the following option is true for FET? Correct Answer Operates with majority carriers only

  • Field-effect transistor amplifiers provide an excellent voltage gain with the added feature of high input impedance and more temperature stability than BJT.
  • They are also considered as a low – power consumption configuration with a good frequency range and minimal size and weight.
  • FET is a three-terminal voltage control uni-polar device (only majority/minority carriers involved in the operation). 

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The difference between FET and BJT is explained in the following table:

FET

BJT

Unipolar device: Uses only one type of charge carrier

Bipolar device: Uses both electron and hole

Voltage-controlled device: voltage between gate and source control the current through the device.

Current-controlled device: Base current control the amount of collector current

High input resistance

Input impedance less than FET

Slower in switching

Faster in switching

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