wjxcom
Full Member level 5
Hi all: I am a fresh man to design analog circuit and design a rail2rail OPA. Now I have already finished this OPA, but now I have a question i.e. I do not know how to simulate the GM of rail2rail OPA.
In order to simulate the GM of a rail2rail OPA, I did .AC analysis, i.e. I add a voltage source VIP to the positive port, and the AC voltage of voltage source is 1V, the common voltage of the voltage source is from 0V to 5V.
I simulate the VOUT/VIP, and take the VIP as the abscissa, but the result is not I wanted.
Help me please, how to simulate the GM of a rail2rail OPA?
In order to simulate the GM of a rail2rail OPA, I did .AC analysis, i.e. I add a voltage source VIP to the positive port, and the AC voltage of voltage source is 1V, the common voltage of the voltage source is from 0V to 5V.
I simulate the VOUT/VIP, and take the VIP as the abscissa, but the result is not I wanted.
Help me please, how to simulate the GM of a rail2rail OPA?