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Answer Posted / 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.
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