phase discriminating means connected to said detecting {HEAD ~ means} for outputting an output signal representing said phase relations detected by {TAIL ~ said detecting means} 
phase discriminating means connected to said detecting { HEAD ~ means } for outputting an output signal representing said phase relations detected by { TAIL ~ said detecting means }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL