The digital clock recovery loop further includes a start up circuit which performs frequency detection when the voltage controlled oscillator first starts up and, in conjunction with the charge pump and loop filters, causes the voltage on {HEAD ~ the control node} of {TAIL ~ the voltage controlled oscillator} to change rapidly 
The digital clock recovery loop further includes a start up circuit which performs frequency detection when the voltage controlled oscillator first starts up and , in conjunction with the charge pump and loop filters , causes the voltage on { HEAD ~ the control node } of { TAIL ~ the voltage controlled oscillator } to change rapidly
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH