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#11




Quote:
I don't see another way to determine Ib.I could write: .... but there are many variables that i don't know. Thanks 
#12




You know the emitter current for the BJT must equal the drain current of the FET.
So If the BJT is in the linear region you can simply apply Hence If you know IB then it's a simple matter to find the BJT base voltage and hence the emitter voltage. 
The Following User Says Thank You to t_n_k For This Useful Post:  
AD633 (07182013) 
#13




Quote:
Now i can find Vb Is this correct? Thanks 
#14




@AD633,
You seem to have some worrying gaps in quite basic DC circuit analysis understanding. There's no logic in your assertion ... How do you not see that the BJT base voltage is the supply voltage less the drop across the 330k base bias feed resistor? You clearly need to strengthen your basic skills before attempting problems like this one. Otherwise you'll end up with significant difficulties in the future. Last edited by t_n_k; 07192013 at 12:07 AM. 
Tags 
bjt, circuit, jfet, transistors 
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