Hybrid model

Hello
For obtaining the hybrid parameters hi,hr,hf,ho we use the equations
Vi=h11*Ii + h12*Vo
Io=h21*Ii + h22*Vo
then we set Vo=0 to get h11 = hi = Vi/Ii = short circuit impedance parameter etc

But how did we get these equations in the first place??[/u][/i]

Maybe this might help.

**broken link removed**

Thanks

Hi!!
Thanks for the link. I couldnt understand most of the stuff though. Maybe it will prove a usefull reference later on!!!
Thanks :roll: [/b]