In general, {TAIL ~ a coarse tuning circuit} controls {HEAD ~ a phase lock loop} of a frequency synthesizer 
In general , { TAIL ~ a coarse tuning circuit } controls { HEAD ~ a phase lock loop } of a frequency synthesizer
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH