ckck20
Member level 1
then 0.7v transistor
Hi,
in the following simple schematic how can I find if the transistors
are OFF or ON(thus Ib,Ic)?For now I don't care about saturation.
We assume that the transistors are identical.(Vbe,b same).Note that VEE<0
I write the system of equations
Vin1 - Vbe - (b+1)*(Ib1+Ib2)*R - VEE=0
Vin2 - Vbe - (b+1)*(Ib1+Ib2)*R - VEE=0
But this system has a solution only if Vin1=Vin2.
This means when the schematic is completely symmetrical and in that
case Ibi=Ib2.
But what happens when Vin1 isn't equal to Vin2?
How is this solved?
Thanks.
Hi,
in the following simple schematic how can I find if the transistors
are OFF or ON(thus Ib,Ic)?For now I don't care about saturation.
We assume that the transistors are identical.(Vbe,b same).Note that VEE<0
I write the system of equations
Vin1 - Vbe - (b+1)*(Ib1+Ib2)*R - VEE=0
Vin2 - Vbe - (b+1)*(Ib1+Ib2)*R - VEE=0
But this system has a solution only if Vin1=Vin2.
This means when the schematic is completely symmetrical and in that
case Ibi=Ib2.
But what happens when Vin1 isn't equal to Vin2?
How is this solved?
Thanks.