I am designing a op amp three stage. With A0=110dB, fu=50.195 Mhz.
In frequency 0.5Mhz, Av= 42.905dB.
I simulate transient with sinusoidal source: f=0.5Mhz, amplitude = 500uV, DC=0.9V
but output voltage have DC level = 1.3542V.
Why the average DC level is changed from 0.9V to 1.3542V?
As I understand, you determined offset voltage for Aol=110dB, but measured result for Aol=42.905dB. It can be the reason why you have different input/output DC voltages. Try do simulation on another frequencies.
As I understand, you determined offset voltage for Aol=110dB, but measured result for Aol=42.905dB. It can be the reason why you have different input/output DC voltages. Try do simulation on another frequencies.