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