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