Why my DC gain cannot reach 100db?

[kim01]

Hurry ask:
I have homework due on Monday. but my DC Gain cannot reach 100db?

 

[evilguy]

i think you better post schematic rather than netlist. dont aspect people simulate your design. what design is that? opamp? and what structure is it. two stage? folded cascode? it difficult to see in the netlist cause we have to draw the circuit to see the structure.

always remember gain=gm*rout. you can tweak this two parameter to increase your gain.

 

[pfd001]

you can try to increase the output resistance.

 

[raduga_in]

if it's ro that you have trouble with .. try increasing
the length of your devices to increase it ..

 

[scottieman]

If your amplifier, I asumme, will not operate in close loop, just use more stages to boost the gain

 

[newton_wang]

reduce bias current, especially the first stage can increase your gain and
improve your phase-margin