The fractional N frequency synthesizer 1 wherein {HEAD ~ the coarse tuning logic} further comprises tuning logic adapted to compare a frequency of {TAIL ~ the divided reference signal} and a frequency of the divided CO signal and effectuate coarse tuning of the CO based on the comparison 
The fractional N frequency synthesizer 1 wherein { HEAD ~ the coarse tuning logic } further comprises tuning logic adapted to compare a frequency of { TAIL ~ the divided reference signal } and a frequency of the divided CO signal and effectuate coarse tuning of the CO based on the comparison
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH