comparision between fet and bjt
Answers were Sorted based on User's Feedback
Answer / ran145
BJT:
Bipolar junction transistor
1. Uses both electrons and holes for conduction
2. Current controlled device
3. Low input impedance
4. Low current applications
5. more noise
6. Less expensive
FET:
Field effect Transistor
1. Uses either electrons or holes for conduction
2. Voltage controlled device
3. High input impedance
4. High power applications
5. less noise
6. More expensive
Is This Answer Correct ? | 19 Yes | 2 No |
Answer / binod kumar naik
bjt is acurrent control device but fet is a voltage control
device.
in case of bjt noise level is more but in fet is less.
in case of bjt impedance is low but fet it is high.
Is This Answer Correct ? | 10 Yes | 0 No |
BJT--> BIPOLAR JUNCTION TRANSISTOR ( BOTH ELECTRON AND HOLE)
* IT IS CURRENT SOURCE
FET-->FIELD EFFECT TRANSISTOR(ELECTRON OR HOLE)
*IT IS VOLTAGE SOURCE
Is This Answer Correct ? | 11 Yes | 2 No |
Answer / rajbharath
fet has high input impedance compared to bjt
fet has low noise compared to bjt.
fet has low power dissipation compared to bjt
Fet has better temp stability as compared to bjt.
Bjt is more temp sensitive than fet
IMPEDENCE IS HIGH COMPARED THEN BJT. JFET IS VOLTAGE DRIVEN
DEVICE WHILE AS BJT CURRENT DRIVEN DEVICE. IN JFET THERE ARE
NO JUNCTIONS AS IN ORDINARY TRANSISTOR, CONDUCTION IS
THROUGH AN n-TYPE OR p-TYPE SEMICONDUCTOR MATERIAL. FOR THIS
REASON NOISE LEVEL IS VERY SMALL.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / rajbharath
bjt is a bipolar device involving both types of charge
carriers ,where as fet is a unipolar device involving only
one type of charge carrier.the main difference is that bjt
is current controller device and fet is voltage controller
device
Is This Answer Correct ? | 0 Yes | 0 No |
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