For example, the detection circuit 26 may detect a rising edge on the digital signal by comparing an amplitude value corresponding to the sample N+1 with the threshold value 32 and determining that {HEAD ~ the amplitude value} is greater than {TAIL ~ the threshold value} 32 
is greater than
For example , the detection circuit 26 may detect a rising edge on the digital signal by comparing an amplitude value corresponding to the sample N+1 with the threshold value 32 and determining that { HEAD ~ the amplitude value } is greater than { TAIL ~ the threshold value } 32
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH