{HEAD ~ A voltage controlled oscillator} is supplied with {TAIL ~ a part} of the output of the phase comparator which controls its oscillation frequency 
is supplied with
{ HEAD ~ A voltage controlled oscillator } is supplied with { TAIL ~ a part } of the output of the phase comparator which controls its oscillation frequency
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH