During coarse tuning, {HEAD ~ a reference signal} used to control an output frequency of the PLL is provided to {TAIL ~ the coarse tuning circuitry} and is divided by a factor M to provide a divided reference signal 
During coarse tuning , { HEAD ~ a reference signal } used to control an output frequency of the PLL is provided to { TAIL ~ the coarse tuning circuitry } and is divided by a factor M to provide a divided reference signal
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH