Firstly i want to say thanks for that great documentation.I have a question about transistor biasing formula used in that lesson.Why Re resistor is 470Ω ?
My calculation is wrong ?

 

Actually

\(V_{BB}=I_BR_B+V_{BE}+V_E\)

 

Hmmm 1μA . 33κΩ = 0.33 V

1.5 V = 0.33 V + 0.7 V + Ve

Ve=0.47

Ic = 1 mA

Ic≈Ie

0.47 V / 1 mA = 470 Ω

Now i understood , thanks

 

Firstly i want to say thanks for that great documentation.I have a question about transistor biasing formula used in that lesson.Why Re resistor is 470Ω ?
My calculation is wrong ?

What lesson are you talking about? Which book, and chapter are you looking at please. I missed that so I had better go and learn it now, before I get into a mess.
Thanks.
Wheelchair Bob

 

They are discussing about Vol 3 (semiconductor) Chapter 4 - biasing calculations

http://www.allaboutcircuits.com/vol_3/chpt_4/10.html

Allen

 

Sorry for delay @absf is right i am talking about voltage divider biasing formula in that page:
http://www.allaboutcircuits.com/vol_3/chpt_4/10.html