wherein {HEAD ~ the comparison apparatus} comprises a comparator having {TAIL ~ a first input} that receives the reference voltage and a second input that receives a single ended signal of the differential signal, and 
wherein { HEAD ~ the comparison apparatus } comprises a comparator having { TAIL ~ a first input } that receives the reference voltage and a second input that receives a single ended signal of the differential signal , and
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH