Patent ID: 7292078

Claim:
An integrated circuit device, comprising: a phase locked loop integrated circuit comprising a phase-frequency detector and first and second charge pumps responsive to first and second control signals generated by the phase-frequency detector, said first and second charge pumps having different current sourcing characteristics when the first control signal is active and different current sinking characteristics when the second control signal is active; wherein the phase-frequency detector is responsive to first and second clock signals; wherein the current sourcing characteristics of the second charge pump dominate those of the first charge pump when a phase difference between the first and second clock signals is greater than a first threshold; wherein the current sourcing characteristics of the first charge pump dominate those of the second charge pump when the phase difference between the first and second clock signals is less than the first threshold; and wherein the current sourcing characteristics of the second charge pump dominate those of the first charge pump when the first and second charge pumps are simultaneously active.