Ai=Av*hfeA1=Ai*Rc/RbSolving Amplifier Questions with Low Frequencies

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The discussion revolves around solving amplifier parameters for a low-frequency transistor circuit using given h parameters. The user has created a pi model and seeks confirmation on the placement of Rb and assistance in calculating parameters such as A1, Ais, Av, Avs, Ri, and R0. There is a suggestion to compute Rpi and clarify the definitions of the requested parameters. Additionally, a comment is made regarding the hfe value being potentially low. The conversation emphasizes the need for accurate calculations and definitions to solve the amplifier questions effectively.
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Homework Statement



We have an amplificator of low frequences like in the figure.The transistor has these h parameters:
hie=1.1k Ohm,hfe=50 Ohm
In the entrance we have Vs and Rs=10 kOhm.
Find A1,Ais,Av,Avs,Ri,Ri',R0 and R0'


Homework Equations



There are many.

The Attempt at a Solution


I ,myself did the pi model like in the figure.Is it correct?
Please,check if I have put Rb in the right place in the pi equivalent
http://i.imgur.com/ClGTLdd.jpg

ALSO,can you please help me find what is asked?
I think that
V0=i0*Rc=-gm*vpi*Rc
Vi=ib*(Rb|| rpi)=Vpi*(Rb/(Rb+rpi)
Av=V0/Vi
Avs=[Ri/(Ri+Rs)]*Av
 
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hfe is dimensionless. Your value of 50 looks too low anyway.

Your model looks OK. Did you compute Rpi?

You are nasking for a lot of parameters and need to define each of them for us.
 

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