What u need is high resolution to resolve tiny difference at input and high speed to accommodate to the sampling rate.) ?, m. j) q2 d, V M+ {
So you need to use comparator making of preamplifiers+latch. Preamplifier has negative exponential response and can amplify the small delta_vin to bigger output which will be developed to Voh thanks to the positive exponential response of the latch. 1 C& E+ H9 E( ~And you may need several stages of preamplifiers with high bandwidth ones for initial stages.
What u need is high resolution to resolve tiny difference at input and high speed to accommodate to the sampling rate.* Y8 G+ e" a4 U/ b2 R/ b& c
So you need to use comparator making of preamplifiers+latch. Preamplifier has negative exponential response and can amplify the small delta_vin to bigger output which will be developed to Voh thanks to the positive exponential response of the latch. 7 D9 S$ w4 l3 P5 D1 }
And you may need several stages of preamplifiers with high bandwidth ones for initial stages.