BJT vs FET

BJT, or Bipolar Junction Transistor,

• Was the first kind to be commercially mass-produced.BJTs conduct using both minority and majority carriers
• Three terminals have corresponding names ‘“ the base, emitter, and collector
• BJTs basically function as regulators of currents. A small current is regulating a larger current. 

 

FET, or Field-effect Transistor

• it has three terminals – source, drain, and gate
• FET is basically a voltage controlled device, due to the fact that its output attributes are established by the field that is dependent on the applied voltage.

 

 

Summary:

1. The BJT is a current-controlled device since its output is determined on the input current, while FET is considered as a voltage-controlled device, because it depends on the field effect of the applied voltage.

2. The BJT (Bipolar Junction Transistor) uses both the minority and majority carriers (holes and electrons), while FETs, which are sometimes called unipolar transistors, uses either holes or electrons for conduction.

3. BJT’s three terminals are named the base, emitter, and collector, while FET’s are named the source, drain, and gate.

4. BJTs are the first type to be commercially massed produced.