The frequency detector 24 detects errors in {TAIL ~ the frequency} generated by {HEAD ~ VCO} 18 and transmits signals to a charge pump 26 to raise or lower the VCO frequency accordingly 
The frequency detector 24 detects errors in { TAIL ~ the frequency } generated by { HEAD ~ VCO } 18 and transmits signals to a charge pump 26 to raise or lower the VCO frequency accordingly
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH