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