The detection circuit 26 may detect, for example, a leading or trailing edge of a signal pulse by monitoring {HEAD ~ samples} of {TAIL ~ the digital signal} 
The detection circuit 26 may detect , for example , a leading or trailing edge of a signal pulse by monitoring { HEAD ~ samples } of { TAIL ~ the digital signal }
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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL