[Moved]: rewriting input admittance of a new circuit Y2(s) based on Y1(s)

[perado]

Hi
I have derived the input admittance of the below circuit in the form of Y1(s)=A(s)/B(s) with replacing the transistors model.

then I add two resistors and one capacitor to the above circuit as below:

now I want to derive the Y2(s), Is it possible to rewrite Y2(s) (for new circuit) based on Y1(s) (old circuit) ? or for deriving the equation of Y2(s) I should replace the transistors models and start from first again??
Best Regards
Perado

 

[electronicman26]

Re: rewriting input admittance of a new circuit Y2(s) based on Y1(s)

Hello
I try to derive the input admittance directly (Y2(s)) , but it is more complicated!

 

[LvW]

Re: rewriting input admittance of a new circuit Y2(s) based on Y1(s)

now I want to derive the Y2(s), Is it possible to rewrite Y2(s) (for new circuit) based on Y1(s) (old circuit) ? or for deriving the equation of Y2(s) I should replace the transistors models and start from first again??
Best Regards
Perado

Yes - I am afraid, you have to start from the beginning (same principle as for the 1st circuit).