How low power does this comparator?

[shaq]

Dear all,

i want to design a ramp generator which has two comparator to generator the ramp signal.
Now, i have a problem. i want the total current of this main stage of the comparator as shown in the attachment around 800nA, i.e. not include buffer stage.

Is it possible to design?

 

[harrytrinh]

The current of main stage will effect to the speed of the comparator. You need to consider your delay requirement? Actually 0.8uA is pretty small current for a fast comparator.