Fast method for calculating voltage gain

[mhjedaboard]

salaam Every body,



is there a faster method for gain(Av0) derivation than using KVL-KCL ? (using KVL-KCL is too slow and complex way for a multistage amplifier.)


I have seen a method used for calculating voltage gain but I don't remember it and it was something like:


output resistance/imput loop resistance


thanks.

 

[D.A.(Tony)Stewart]

R ratios

Av-= - Rf/Rin for feedback and input R
Av+ = 1 + |Av-|

same for filters using Z instead of R
where Z = |R +X(f)|

 

[mhjedaboard]

R ratios

Av-= - Rf/Rin for feedback and input R
Av+ = 1 + |Av-|

R ratios

Av-=R feedback/R shunt
Av+ = 1 + |Av-|

thanks Sunny,
but I want the gain for a simple common emitter or common base or common gate amplifier stage.

how to calculate it here?

 

[D.A.(Tony)Stewart]

Make sure Rf >> Rout impedance of Op Amp
eg use >>10K

same for CE amp
Av= Rc/Re

where Rc includes load of next stage

And if Re is bypassed with large C, then Re includes rBE and ESR of cap.