mario.chillemi wrote:
I update my version of multistage inverter in Ac analysis. Can you tell me if
it's okay with gain and V2-V3 value?
Most often, people set the AC source amplitude to 1V. With your
differential source, I'd use 0.5V for each of the two sources, to get
1V differential input voltage.
The reason is that it makes it easier to see the voltage gain. Gain =
Vout/Vin, and when Vin=1, Gain = Vout. So looking at the plot of
Vout, it IS the voltage gain too.
AC analysis is a "small-signal" linear (linearized) analysis, which
means signal amplitudes don't actually matter. You could drive it
with an AC amplitude of 100V and the analysis would be the same as if
you had used 1uV.
I suppose you might want to play with the DC offset voltage a bit (the
DC voltage of V2), to see what effect it has on AC gain.
Regards,
Andy
