Happy New Year!

I am studying an emitter-follower amplifier circuit (small signal).
I have attached the sim file. I am trying to calculate the ac
collector, base and emitter currents as well as the input power.
I have also attached an excel file containing various calculations.

David

 

Do you have any specific question? Also I do not open xlsx files.

 

Do you have any specific question? Also I do not open xlsx files.

Hi Jony130

I am trying to calculate the ac collector, base and emitter currents as well as the input power.

I have attached an image of my analysis worksheet.

 

Well, the simplest way will be to solve this linear circuit if you want to know the AC component.

 

Well, the simplest way will be to solve this linear circuit if you want to know the AC component.


View attachment 166778

ie = ib + β * ib = ib * (1 + β)
∴ ib = ie / (β + 1)

Since ie = i_load = vout / r_load = 3.51 V / 359 Ω = 9.78 mA peak

ib = 9.78 mA / (100 + 1) = 96.83 uA peak

and

ic = ie - ib = 9.78 mA - 96.83 uA = 9.68 mA or ic = ib * β = 96.83 uA * 100 = 9.68 mA

Thanks