what happens if emitter-base & base-collector junctions are forward biased with 0.7V?

[DEV123]

what happens if emitter-base & base-collector junctions are forward biased with 0.7V?

I have a doubt regarding BJT. what happens if both emitter-base & base-collector junctions are forward biased with 0.7V ? will BJT be in saturation region? What will be the voltage across the collector and emitter and \[I_C\] ?

-Devanand T

 

[vishnu438]

Re: what happens if emitter-base & base-collector junctions are forward biased with 0

no if both the junctions are forward biased the BJt acts as a ON swith. if input junction is forward biased and output junction is reverse biased then the BJT will be in saturation region.
when it is a on switch very less amount of voltage will be dropped across it. ideally it should be zero.

 

[DEV123]

Re: what happens if emitter-base & base-collector junctions are forward biased with 0

if input junction is forward biased and output junction is reverse biased then the BJT will be in saturation region.

No it will be in active region.

 

[varunkant2k]

Re: what happens if emitter-base & base-collector junctions are forward biased with 0

I have a doubt regarding BJT. what happens if both emitter-base & base-collector junctions are forward biased with 0.7V ? will BJT be in saturation region? What will be the voltage across the collector and emitter and ?

What is the condition when you see VBE = VBC = 0.7V. I guess you may have fixed collector and emitter voltage. This acts in saturation and YOu already have fixed VCE then. So you have constant VCE, Constant IC, and constant gm.