Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications
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Parameter
BJT
FET
Bipolar/Unipolar
It is bipolar device i.e. current in this device is carried by electrons and holes.
It is unipolar device i.e. current in this device is carried by either electrons or holes.
Thermal Runaway
Can occur
Cannot occur
Noise
More
Less
Applications
Automatically controlled switches, TTL circuits, amplifiers, drivers circuits etc.
FETs are widely used as input amplifiers in oscilloscopes, electronic voltmeters and other measuring and testing equipment because of their high input impedance.
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