wherein the comparator compares the reference voltage with {HEAD ~ the single ended signal} to generate {TAIL ~ the comparison output signal} 
wherein the comparator compares the reference voltage with { HEAD ~ the single ended signal } to generate { TAIL ~ the comparison output signal }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL