http://postimg.org/image/5h0y8pn6x/
thanks a lot

 

...............and the question is???
Max.

 

how I can get answer i1 and i2?

http://postimg.org/image/ruzu9z7df/

thanks

 

Seems simple enough. I think textbook should have example or two on how to solve this type of problem.

 

Seems simple enough. I think textbook should have example or two on how to solve this type of problem.

http://postimg.org/image/74ghsdpul/

if simple for u !
can u explain how get answer i1 and i2?

thanks

 

Use Thévenin to create an equivalent schematic at the base of the transistor.

Rb= R1//R2
Vb= (Vcc*R2)/(R1+R2)
Now you can find Ib ==> Vb = -Ib*Rb -0.7 -Ie*Re with Ie=Ib(beta+1)
Ib= -(Vb+0.7)/(Re(beta+1)+Rb)

Go back the orignal schematic and now you know what current is flowing out of the base.

Vcc = (I2+Ib)*R1+I2*R2 ==> Find I2
I1 = I2+Ib

Mind the signs.

 

Use Thévenin to create an equivalent schematic at the base of the transistor.

Rb= R1//R2
Vb= (Vcc*R2)/(R1+R2)
Now you can find Ib ==> Vb = -Ib*Rb -0.7 -Ie*Re with Ie=Ib(beta+1)
Ib= -(Vb+0.7)/(Re(beta+1)+Rb)

Go back the orignal schematic and now you know what current is flowing out of the base.

Vcc = (I2+Ib)*R1+I2*R2 ==> Find I2
I1 = I2+Ib

Mind the signs.

thanks bro