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