Re: about speed of compare
suppose power supply is 5V, inp(in+) of comp is step sigal, which is 2.498V at first, using 1ns step changes 2.502V, and inn(in-) of comp is 2.5V, out will change from 0V to 5V if comp is perfect,but how many is time of change from 0V to 5V? which parameters will determine this time? otherwise comp is not so perfect, when 2.498V and 2.5V compare, out is perhaps 1V; when 2.502V and 2.5V compare, out is 3V. so as to realize logic supply,perhaps two inverters will be added.