Electronics - Bipolar Junction Transistors (BJT) - Discussion
Discussion Forum : Bipolar Junction Transistors (BJT) - Filling the Blanks (Q.No. 8)
8.
A bipolar junction transistor has ____ regions of operation.
Discussion:
25 comments Page 1 of 3.
Minh said:
8 years ago
There are 4 regions of operation of a bipolar junction transistor.
In an NPN BJT, the regions are defined as follow:
1. Forward active: VBE >= VBEon, VCE >= VBE.
2. Saturation: VBE >= VBEon, VCE < VBE.
3. Cutoff: VBE < VBEon, VCE >= VBE.
4. Reverse active: VBE < VBEon, VCE < VBE.
In an NPN BJT, the regions are defined as follow:
1. Forward active: VBE >= VBEon, VCE >= VBE.
2. Saturation: VBE >= VBEon, VCE < VBE.
3. Cutoff: VBE < VBEon, VCE >= VBE.
4. Reverse active: VBE < VBEon, VCE < VBE.
Manoj said:
1 decade ago
Hey @Ajay they asked regions in cut off it is used as open switch and in saturation it is used as closed switch and in active region used as amplifier. In cutoff and saturation it is used as two type of switches so it should be divided into two regions.
Himanshu paliwal said:
1 decade ago
2 region of working.
b/a in active region its work as an amplifier
in saturation region it work as short circuit
but in cut of its does not work like open circuit.
That's why its only work in 2-region active & saturation region.
b/a in active region its work as an amplifier
in saturation region it work as short circuit
but in cut of its does not work like open circuit.
That's why its only work in 2-region active & saturation region.
Vishal maruti sawant said:
2 years ago
---------------- > JBE --- JCB --- Application
Saturation = FB --- FB. --- On switch.
Cut off = RB --- RB. --- Off switch.
Forward Active = FB --- RB --- Amplifier.
Reverse active = RB --- FB --- Atinuater.
Saturation = FB --- FB. --- On switch.
Cut off = RB --- RB. --- Off switch.
Forward Active = FB --- RB --- Amplifier.
Reverse active = RB --- FB --- Atinuater.
Arun said:
9 years ago
BJT has 4 mode or region of operation.
1) Active = used as amplifier.
2) Saturation = switch (ON).
3) Cut -ff= switch (OFF).
4) Invert mode = NOT IN USE.
1) Active = used as amplifier.
2) Saturation = switch (ON).
3) Cut -ff= switch (OFF).
4) Invert mode = NOT IN USE.
Ajay patel said:
1 decade ago
All of above and below are wrong transistor has only 2 region of working.
As switch in cut-off and saturation.
As amplifier in active region.
As switch in cut-off and saturation.
As amplifier in active region.
Shiv said:
1 decade ago
Inversion region is a cutoff region. If input is high (5v) output equals zero. The output is inverted and operated in cutoff region.
Shahin Ali said:
1 decade ago
In BJT Transistor Operate only One Region that is the ACTIVE Region because Transistor actual work in Active Region.
Sadhana sonvane said:
1 decade ago
Finally correct answer is transistor has 3 regions of operation like cut off, active, saturation.
Engr Azhar Mehmood said:
1 decade ago
There are three regions of operations not two and four inversion makes use of cut off region.
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