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 {HEAD ~ the loop filter} is provided externally to {TAIL ~ 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 
is provided externally to
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 { HEAD ~ the loop filter } is provided externally to { TAIL ~ 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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