The circuit 21, wherein the third stage compares the one eighth, one fourth, three eighths, one half, five eighths, {HEAD ~ three fourths}, and seven eighths amplitude values to {TAIL ~ the threshold amplitude value} and generates the time of arrival adjustment value based on the comparisons 
The circuit 21 , wherein the third stage compares the one eighth , one fourth , three eighths , one half , five eighths , { HEAD ~ three fourths } , and seven eighths amplitude values to { TAIL ~ the threshold amplitude value } and generates the time of arrival adjustment value based on the comparisons
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH