finals-BJT & FET Flashcards
Two types of charge carriers in BJT
majority and minority charge carriers
‘n’ and ‘p’ carriers respectively in _______
npn transistor
‘p’ and ‘n’ carriers respectively in _______
pnp transistor
Control the flow of majority charge carriers by controlling minority charge carriers
BJT
Current Operating device:
Ib controls flow of Ic/Ie
_____ is the storage of charge carriers in the _______
BJT, base region
Bigger in size compared to FET
BJT
Temperature sensitive and more Noisy
BJT
Low input impedance but more power consumption
BJT
Not suitable for VLSI ICs
BJT
it Limits the speed of operation
BJT
The ordinary or bipolar transistor has 2 main disadvantages:
1) low input impedance
2) considerable noise level
To overcome the problem of BJT, FET is introduced because of 3 reasons:
1) High input impedance
2) Low noise level than ordinary transistor
3) JFET is a type of FET
a unipolar device
FET
FET involve only one type of charge carriers; ______ in its operation.
‘n’ or ‘p’
Control the flow of charge carriers by controlling the electric field.
FET
Voltage controlled Device (gate voltage controls drain current)
FET
Less Noisy as compared to BJT
FET
No minority carrier storage (Turn off is faster)
FET
Very small in size, occupies very small space in ICs
FET
Low Voltage Low Current Operation (Low-power consumption)
FET
Has Higher input impedance
FET
less sensitive to temperature variations
FET
more easily integrated on ICs
FET
Provide less gain compared to BJT
FET
More static sensitive than BJT
FET
FET consists of 3 terminal:
1) Gate
2) Source
3) Drain
4 types of FET
1) JFET
2) MOSFET
3) MESFET
4) MISFET
