{HEAD ~ The integrated circuit} 1, wherein the PLL further comprises a loop filter between an output of the charge pump and an input of the VCO, and wherein {TAIL ~ the loop filter} is provided externally to the IC via a loop filter port of the IC, such that a user of the IC can adjust parameters of the loop filter specifically tailored to specific operations of the PLL 
{ HEAD ~ The integrated circuit } 1 , wherein the PLL further comprises a loop filter between an output of the charge pump and an input of the VCO , and wherein { TAIL ~ the loop filter } is provided externally to the IC via a loop filter port of the IC , such that a user of the IC can adjust parameters of the loop filter specifically tailored to specific operations of the PLL
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